Rec.food.preserving Official FAQ

Version 5.0.0, Last Updated: 2-12-11

Part 2 of 9

© Copyright 2003, 2011 by Jack Eddington on behalf of all the authors. All rights reserved. You may use and copy this file as long as the contributors' names and this copyright and *all* disclaimers remain intact. You may not sell, trade or in any other way profit from all or any part(s) of this document or make any portion of this document part of anything sold, traded, etc. unless you are the author of the part(s) used. Plagiarism is naughty, even on the Internet.

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Latest Changes - All Parts
See the differences file for a complete, chronologically ordered sequence of changes.


I. The techniques of food preserving (Parts 2-5)

   A. Canning (Part 2)
  1. General Questions
  2. A.1.1 What do I *really* need to know about canning?
    Basically, canning food is preserving food by: 1) placing it in an hermetically sealable container, then 2) applying a heat treatment that will destroy microorganisms and inactivate enzymes that would spoil the product or render it unsafe. (from Jean Bergeron, foodchemist, ). A partial vacuum is created by a change in pressure caused by heating, then cooling said sealable cans and jars--Boyle's Law (PV=nRT) in action. The heat is generally created by either a boiling waterbath or a pressure canner (Boyle's Law again). For a short overview on canning basics, see Ohio State's Fact Sheet.

    What you absolutely need to know is whether your product is highly acidic (low pH) or not. High acid foods, like fruits and pickles, can be canned in a boiling waterbath; relatively low acid foods, like vegetables and meats, need to be pressure canned. You also need to know what your altitude is, because the higher you are, the lower the boiling temperature of water. Since you are creating an anerobic state, you need to be concerned about _C. botulinum_ toxin. For a more detailed discussion on botulism, see Part 8, Section D

    In addition, you also need to know that working with pH is not like working with most things. pH is measured on a logorithmic (base 10) scale. What that means is that if one liquid has a pH of 7.0 (like water) and another liquid has a pH of 3 (like a 5% vinegar solution), if you mix them equally (equal amounts of each by volume), you can't average the pHs to get a pH of 5. A pH of 3 is 10,000 times more acidic than a pH of 7 (which is considerred neutral-neither acidic nor basic). Thus that mixture would have a pH of approximately 3.3.

    A.1.2 I made/got some home-preserved foods as a gift. How do I check them for safety?
    ----
    [File from Susan Brewer, no longer available online to the best of my knowledge. --JTE]
    ----
    Return to ToC

    EXAMINE ALL HOME-CANNED FOODS BEFORE USING THEM.
    Return to ToC

    A.1.3 Is home canning safe?
    Yes. As long as you know the limitations.

    Only two home-canning (processing) techniques are considered safe. The boiling waterbath process is used for high-acid (low pH) foods like fruit, while pressure canning is used to process low-acid foods such as vegetables.

    Open kettle canning, oven canning, crockpot canning, compost canning, canning with pills, microwave canning, dishwasher canning, steam canning (don't confuse with pressure canning) are all outdated or disreputable canning techniques.

    A.1.4 What foods can be home canned, and what foods shouldn't be?
    Foods considered high acid (pH lower than 4.6/4.7) can be boiling waterbath canned. This next chart is reworked from _Putting Food By_.

    Boiling Water Bath
    Foods at pH 2.0-3.0lemons, gooseberries, underripe plums
    Foods at pH 3.0-3.5ripe plums, underripe apples, ripe oranges and grapefruit, strawberries, rhubarb, blackberries, cherries, raspberries, blueberries, very underripe peaches and apricots
    Foods at pH 3.5-4.0ripe apples, oranges, grapefruit, overripe blackberries, cherries, raspberries, and peaches, ripe apricots, underripe pears, pineapple, sauerkraut, (other pickles?)
    Foods at pH 4.0-4.6 (BORDERLINE)tomatoes, figs
    Above 4.6 or somust be pressure canned

     

    Pressure Canning
    Foods at 4.6-5.0some tomatoes, depends on the variety. (Green tomatoes are below 4.6). Pimentoes, pumpkin. USDA suggests that pumpkin butter cannot be canned safely.
    Foods at 5.0-6.0carrots, beets, squash, beans, spinach, cabbage, turnips, peppers, sweet potatoes, asparagus, mushrooms, white potatoes
    Foods at 6.0-7.0peas, tuna, lima beans, corn, meats, cow's milk, salmon, oysters, shrimp.
    Above 7.0hominy, black olives (each are lye cured). Leave these to the pros.

    Check the list of pH readings for common foods and condiments below. Need to also consider the size of your jars (half gallon size jars are made, but you probably shouldn't can with them), the physical properties of your food and the gooeyness of what you are canning. Pumpkin/squash purees and butters, and refried beans probably shouldn't be home canned--it will take a long time to get the center of the jar hot enough. However, squash and pumpkin chunks (raw pack) can be pressure canned. [Interestingly, spinach and chard shouldn't be home canned because the leaves will condense into a mass, insulate the center of jar, and form a dangerous cold spot--Louis Nagel.]

    Also, cream soups and cream-style vegetables shouldn't be home canned for the same reason that pumpkin butter shouldn't be canned.

    Return to ToC

    A.1.5 pH determinations of common foods and condiments.
    Remember pH 4.6 is the cutoff. Above pH 4.6, a recipe must have enough added acid to be waterbath processed, or must be pressure canned. If you still don't find your food here, citations are listed for still more of them.

    From http://vm.cfsan.fda.gov/~mow/app3a.html

    VEGETABLES             pH              VEGETABLES             pH
    Artichokes             5.6            Peas                   5.8 - 7.0
    Canned               5.7 - 6          Frozen               6.4 - 6.7
    Asparagus              4  -  6          Canned               5.7 - 6.0
    Canned               5.2 - 5.3        Dried                6.5 - 6.8
    Buds                 6.7            Pepper                 5.15
    Stalks               6.1            Pimiento               4.6 - 4.9
    Beans                  5.7 - 6.2      Potatoes               6.1
    String               4.6            Tubers                 5.7
    Lima                 6.5            Sweet                  5.3 - 5.6
    Kidney               5.4 - 6        Pumpkin                4.8 - 5.2
    Beets                  4.9 - 5.6      Radishes (red)         5.8 - 6.5
    S [huh?]               4.2 - 4.4        (white)              5.5 - 5.7
    Canned               4.9            Rhubarb                3.1 - 3.4
    Brussel sprouts        6.0 - 6.3        Canned               3.4
    Cabbage                5.2 - 6.0      Rice (all cooked)
    Green                5.4 - 6.9        Brown                6.2 - 6.7
    White                6.2              White                6.0 - 6.7
    Red                  5.4 - 6.0        Wild                 6.0 - 6.4
    Savoy                6.3            Sauerkraut             3.4 - 3.6
    Carrots                4.9 - 5.2      Sorrel                 3.7
    Canned               5.18-5.22      Spinach                5.5 - 6.8
    Juice                6.4              Cooked               6.6 - 7.2
    Cauliflower            5.6              Frozen               6.3 - 6.5
    Celery                 5.7 - 6.0      Squash (all cooked)
    Chives                 5.2 - 6.1        Yellow               5.8 - 6.0
    Corn                   6.0 - 7.5        White                5.5 - 5.7
    Canned               6.0              Hubbard              6.0 - 6.2
    Sweet                7.3            Tomatoes (whole)       4.2 - 4.9
    Cucumbers              5.1 - 5.7        Paste                3.5 - 4.7
    Dill pickles         3.2 - 3.5        Canned               3.5 - 4.7
    Eggplant               4.5 - 5.3        Juice                4.1 - 4.2
    Hominy (cooked)        6.0            Turnips                5.2 - 5.5
    Horseradish            5.35           Zucchini (cooked)      5.8 - 6.1
    Kale (cooked)          6.4 - 6.8
    Kohlrabi (cooked)      5.7 - 5.8                  FRUITS
    Leeks                  5.5 - 6.0      Apples
    Lettuce                5.8 - 6.0        Delicious            3.9
    Lentils (cooked)       6.3 - 6.8        Golden Delicious     3.6
    Mushrooms (cooked)     6.2              Jonathan             3.33
    Okra (cooked)          5.5 - 6.4        McIntosh             3.34
    Olives (green)         3.6 - 3.8        Winesap              3.47
    (ripe)          6.0 - 6.5        Juice                3.4 - 4.0
    Onions (red)           5.3 - 5.8        Sauce                3.3 - 3.6
    (white)         5.4 - 5.8      Apricots               3.3 - 4.0
    (yellow)        5.4 - 5.6        Dried                3.6 - 4.0
    Parsley                5.7 - 6.0        Canned               3.74
    Parsnip                5.3            Bananas                4.5 - 5.2
    FRUITS (contin.)         pH               MEAT, POULTRY         pH
    Cantaloupe             6.17-7.13      Beef
    Dates                  6.3 - 6.6        Ground               5.1 - 6.2
    Figs                   4.6              Ripened              5.8
    Grapefruit             3.0 - 3.3        Unripened            7.0
    Canned               3.1 - 3.3        Canned               6.6
    Juice                3.0              Tongue               5.9
    Lemons                 2.2 - 2.4      Ham                    5.9 - 6.1
    Canned juice         2.3            Lamb                   5.4 - 6.7
    Limes                  1.8 - 2.0      Pork                   5.3 - 6.9
    Mangos                 3.9 - 4.6      Veal                   6.0
    Melons                                Chicken                6.5 - 6.7
    Cassaba              5.5 - 6.0      Turkey (roasted)       5.7 - 6.8
    Honey dew            6.3 - 6.7
    Persian              6.0 - 6.3          FISH
    Nectarines             3.9            Fish (most fresh)      6.6 - 6.8
    Oranges                3.1 - 4.1      Clams                  6.5
    Juice                3.6 - 4.3      Crabs                  7.0
    Marmalade            3.0            Oysters                4.8 - 6.3
    Papaya                 5.2 - 5.7      Tuna fish              5.2 - 6.1
    Peaches                3.4 - 3.6      Shrimp                 6.8 - 7.0
    In jars              4.2            Salmon                 6.1 - 6.3
    In cans              4.9            Whitefish              5.5
    Persimmons             5.4 - 5.8      Freshwater (most)      6.9 - 7.3
    Pineapple              3.3 - 5.2      Sturgeon               5.5 - 6.0
    Canned               3.5            Herring                6.1 - 6.4
    Juice                3.5
    Plums                  2.8 - 4.6          DAIRY PRODUCTS/EGGS
    Pomegranates           3.0            Butter                 6.1 - 6.4
    Prunes                 3.1 - 5.4      Buttermilk             4.5
    Juice                3.7            Milk                   6.3 - 8.5
    Quince (stewed)        3.1 - 3.3        Acidophilus          4.0
    Tangerines             4.0              Cream                6.5
    Watermelon             5.2 - 5.8
    Cheeses
    BERRIES                                 Camembert            7.44
    Blackberries           3.2 - 4.5        Cheddar              5.9
    Blueberries            3.7              Cottage              5.0
    Frozen               3.1 - 3.35       Cream cheese         4.88
    Cherries               3.2 - 4.1        Edam                 5.4
    Cranberries                             Roquefort            5.5 - 5.9
    Sauce                 2.4              Swiss Gruyer         5.1 - 6.6
    Juice                2.3 - 2.5      Eggs
    Currants (red)         2.9              White                7.0 - 9.0
    Gooseberries           2.8 - 3.1        Yolk                 6.4
    Grapes                 3.4 - 4.5        Egg solids, whites   6.5 - 7.5
    Raspberries            3.2 - 3.7      Whole                7.1 - 7.9
    Strawberries           3.0 - 3.5      Frozen               8.5 - 9.5
    Frozen               2.3 - 3.0
    BAKERY PRODUCTS        pH
    Bread                  5.3 - 5.8
    Eclairs                4.4 - 4.5
    Napoleons              4.4 - 4.5
    Biscuits               7.1 - 7.3
    Crackers               7.0 - 8.5
    Cakes
    Angel food           5.2 - 5.6
    Chocolate            7.2 - 7.6
    Devil's food         7.5 - 8.0
    Pound                6.6 - 7.1
    Sponge               7.3 - 7.6
    White layer          7.1 - 7.4
    Yellow layer         6.7 - 7.1
    Flour                  6.0 - 6.3
    MISCELLANEOUS
    Caviar (domestic)      5.4
    Cider                  2.9 - 3.3
    Cocoa                  6.3
    Corn syrup             5.0
    Corn starch            4.0 - 7.0
    Ginger ale             2.0 - 4.0
    Honey                  3.9
    Jams/Jellies           3.1 - 3.5
    Mayonnaise             4.2 - 4.5
    Molasses               5.0 - 5.5
    Raisins                3.8 - 4.0
    Sugar                  5.0 - 6.0
    Vinegar                2.0 - 3.4
    Yeast                  3.0 - 3.5
    

    pH values were derived from the following references:
    [Embarcadero Home Cannery at 2026 Livingston Street/ Oakland CA 94606 (510) 535-2311 sells pH papers. If you are nervous about some of your items and recipes, they could help.--LEB]

    A.1.6 What does home canning entail?
    These are two sample recipes, just to give a general idea of what is involved, one is for a waterbath treatment, the other involves pressure canning. Some comments of special interest have been added in [with initials]), to benefit the canning newbie. Both of these recipe files are taken from Susan Brewer's fact sheets.
    Initials: LEB = Leslie Basel, ED = Eric Decker, LN = Louis Nagel

    Return to ToC

    CANNING FRUITS (PEACHES)

    Fresh fruit for home canning should be at the peak of ripeness--they should have lost their greenish color and should yield slightly when squeezed. [The peak-ripe fruit has the most dependable amounts of acid and pectin--LEB]. Fruit should be prepared (peeled, trimmed), treated to prevent browning, and hot-packed to exhaust air and make fruit more pliable. Hot-packing will help prevent fruit from floating in the syrup. Prepare syrup, hot pack fruit and water bath can. Use USDA Complete Canning Guidelines or "Canning Card" (EHE-660) for processing time. [The USDA Canning Guide is on-line, check Part 9, Section VII under Internet Sites for the url. --JTE]

    Recommended Quantities:

    Peaches, apples, pears:
    17 1/2 lb fresh = 7 qt. ll b = 9 qt. 1 bushel = 48 lb = 16-24 qt (2 1/2 lb per quart)

    Berries:
    1 1/2-3 lb (1-2 qt) fresh = 1 quart canned

    Plums:
    1 1/2-2 1/2 lb fresh = 1 quart canned

    Preparing Jars
    1. Wash jars by hand or in dishwasher. Rinse well. [Please remember that the dishwasher cleans the jars a little, and keeps them warm--it does not sterilize them.--ED, LEB]
    2. Prepare lids according to manufacturer's directions. [Take a careful look at the rims, the counterpoint to the lids.--LN]

    Preparing Peaches
    1. Wash your hands.--everybody, your mom :)
    2. Wash peaches under running water. [Important to remove dust and dirt. Soil bacteria are important source of spoilers.--LEB]
    3. Skin removal (peaches, apricots): [Blanching step.]
    4. Cut peaches in half, remove pits, slice if desired.
    5. To prevent darkening put slices in any of these antidarkening solutions:
    6. Remove from antidarkening solution and drain just before heating or raw packing.
    7. Syrup
    8. Pack
    9. Overlap fruit pieces in jars to minimize air spaces.
    10. Add liquid (syrup, fruit juice, water) leaving 1/2 inch of headspace. Headspace is where the seal will develop. Too much/too little will produce weak seals.
    11. Work out air bubbles with plastic or wooden utensil. If large amounts of air remain after processing, you get less of a vacuum and weak seals.--LEB Plastic/stainless steel utensils best, wood can put splinters in food, thus is verboten.--LN
    12. Wipe off jar rims thoroughly to make sure the sealing surface is clean and free from fruit or sugar which would prevent sealing. Very important for a beginner to remember to do.
    13. Add lids to the top, using tongs or a lid lifter. Don't touch the inside rim with your fingers.
    14. Screw ring bands onto the jars finger tight, plus a quarter turn more.
    15. Processing Procedure:
    16. (a) 2" far better than 1", because the water will boil off. Too little water will leave an underprocessed jar.--LN Should add boiling water instead of just hot water, to keep the water boiling.--ED, LN If you are a newcomer to all this, might want to measure the water depth.--LEB
      (b) Remember that you need to know your elevation, and convert accordingly. Recipe times assumed for sea level. Check Section V for way to determine your elevation.

    17. Cooling Jars:
    18. NOTE: Hot glass can break or crack if cooled too quickly. BTW, If you hear a loud pop or click, the vacuum seal formed very quickly. This is the nicest sound in all canning.--LEB

    19. Checking Seals:
    20. (a) Another seal test: hold the jar up by the lid w/o the ring. If the jar falls, the seal was bad. (Catch the jar. :)
      (b) If the jars are very sticky, might want to reprocess, because some of this is trapped in the seal.--LN
      (c) Must do the reprocessing within 24 hrs of original processing time.

    21. Storing Home-Canned Fruits:
    ---
    Prepared by Susan Brewer/Foods and Nutrition Specialist/Revised, 1992 EHE-663
    ----

    Return to ToC

    CANNING TOMATO-VEGETABLE JUICE BLENDS

    Tomatoes are a somewhat acid food. To make them safe for home canning ACID MUST BE ADDED. To each quart jar of tomatoes or tomato juice, 2Tbsp of lemon juice, or 4 Tbsp of 5% vinegar, or 1/2 tsp of citric acid must be added. When adding vegetables which are low in acid, the instructions must be followed exactly.

    You may add less vegetable, but you must not add more vegetable than the recipe calls for. You may adjust the spices and seasonings to your taste, for example more or less pepper, add a little tabasco, or more sugar. And, you may vary the kinds of vegetables as long as you do not add more than three cups total vegetables to 7 quarts of juice. For example, you may use 2 cups of onions and 1 cup of celery, or 1 cup each of green pepper, onion, and carrots. But no more than 3 cups total of vegetables will be safe. [Check out Part 9, Section V. Recipe Caveats and Troubleshooting Guide, specifically see Table A.2 2 and the following paragraph for the vegetable/acid rules.]

    An average of 22 pounds of tomatoes is needed per canner load of 7 quarts.

    Preparation for Canning:
    1. Wash jars by hand or in dishwasher. Rinse well. [Check the dishwasher question A.3.5 for more info.--LEB]
    2. Prepare lids according to manufacturer's directions.
    3. Put 2 to 3 inches of water in pressure canner, or 5 to 7 inches of water in boiling water bath canner. Be sure canner has rack.
    4. Start water heating. It should be hot but not boiling when the jars go in.

    Prepare juice:
    1. Wash your hands. :)
    2. Wash tomatoes and vegetables under running water. Trim and discard any bruised or discolored sections.
    3. Chop carrots, onions, celery and green peppers, or your preferred combinations. For 7 quarts of juice you may add up to 3 cups of chopped vegetables.
    4. To prevent juice from separating, quickly cut about 1 pound of fruit into quarters and put directly into saucepan. Heat immediately to boiling while crushing. Continue to slowly add and crush fresh tomato quarters into the boiling mixture. Make sure the mixture boils constantly while you add the remaining tomatoes.
    5. Add the chopped vegetables to the boiling tomatoes.
    6. Add sugar, salt, and spices. For 7 quarts of juice, a mixture of 1/3 C sugar, 1/4 C salt, 1 Tbsp celery seed and 1/8 tsp cayenne pepper is a good combination.
    7. Simmer mixture for 20 minutes.
    8. Press hot mixture through a sieve or food mill to remove skins and seeds.
    9. Reheat juice to boiling.

    Fill jars:
    1. Add 2 Tbsp lemon juice (or alternatives-see above) to each quart jar.
    2. Fill boiling juice into jars, leaving 1/2 inch headspace.
    3. Wipe top sealing edge of jar with a clean damp towel.
    4. Adjust 2-piece canning lids. Tighten ring bands using thumb and two fingers until just snug, then using whole hand, tighten 1/4 turn further. [Don't tighten further especially if pressure canning, need the interior of the jars to equilibrate with the pressure during processing.]

    Processing:
    1. Place jars on rack in canner so that they do not touch sides.
    2. Add hot water to boiling water bath if necessary to bring water 1-2 inch over tops of jars.
    3. Cover canner, or lock pressure canner lid into place.
    4. Turn up heat.
    5. Process:
      Boiling water bath canner: when water reaches full boil, begin to count processing time. Set timer for specified time. Add water to boiling water canner if necessary to maintain proper depth. [Your *accurate* timer is important here. Should be clock wound or use an electronic battery.--LN]
      Pressure canner: When steady stream of steam issues from vent, set timer and allow to exhaust steam for 10 minutes. After 10 minutes, close petcock or put weighted pressure regulator on vent. When dial gauge reads 11 psig, or when weight begins to rock or hiss at manufacturer's stated rate, set timer for specified processing time, and gradually reduce heat to maintain proper pressure. [Gradual is important here--don't cut the heat so radically to lose pressure, otherwise have to retime.]

    6. PROCESSING TIMES for canning in Illinois:
      Boiling Water     Pressure Canner (10/11 psig)
      Pints             35 minutes         15 minutes
      Quarts            40 minutes         15 minutes
      
      [Check your p.canner gauge at least once/year.--LN] [Remember to alter times/pressure for your elevation. If you live in the US, check the geographical nameserver listed in Section V.--LEB]

      After processing time is complete:
      1. Remove canner from heat. Allow pressure to drop to zero. Wait 3 more minutes. Open canner with lid away from you to avoid steam in your face. [Don't try to speed this up; just simply turn off the burner and allow to cool. Even moving a canner to a cool burner can be a bit dangerous.--LN]
      2. Remove jars from canner. Place upright on rack to cool away from drafts.
      3. Do Not Tighten ring bands. They will tighten as they cool.
      4. After 12-24 hrs check seals. Center of lid should be depressed and not give when touched. A tap with a spoon should give a clear ring.
      5. Remove ring bands, wipe with warm sudsy water, rinse, label and store.
      6. Unsealed jars may be reprocessed, or refrigerated.
      ---
      Prepared by Mary A. Keith, Foods and Nutrition, July, 1991
      Revised by M. Susan Brewer, Foods and Nutrition, June, 1992 EHE-692
      ----

    A.1.7 Where do I get the Ball Blue Book? And the USDA Canning Guide?
    Most of the food preservation sources are in the back of this FAQ, but the Ball Blue Book (BBB) is the great canning classic of all time (unless you have the Kerr Canning Guide). First time canners are *well* advised to pick up a copy. Places where you can order or find the BBB are:


    The USDA Canning Guide is online. Check under Internet Sources ( Part 9, Section VII) for the exact addresses.

    A.1.8 What if my recipe doesn't have processing instructions?
    Check out the section in this FAQ entitled Recipe Caveats and Troubleshooting ( Part 9, Section V). Or follow the recipe, *don't* process, and simply refrigerate the results.

    A.1.9 Where can I find out my elevation so I can alter my processing times?
    You have a few options:

    1. Contact your nearest airport and ask (thanks to Barb Schaller for this tip)
    2. Penn State (http://foodsafety.cas.psu.edu/presqueryform.cfm) has good info but is limited to the U.S.
    3. If you live in Canada, try http://etopo.ca/downloads.html (Thanks to The Jonses). You have to dowload a program but it looks good.

    If you find any urls to handle places not in North America, please let the FAQ amintainer know.

    A.1.10 How do I obtain a good stable jel (or 'set')?

    The following is taken from from a document on the ITDG (the Intermediate Technology Development Group) website.
    It will have been noted that the pH of a preserve has to lie between 3.0 and 3.3 in order to obtain a good stable gel (or 'set'). Most fruits lie in this pH range. Those above 3.3 require the addition of citric acid to bring the pH down to the required range. Lime juice however has a pH of 2.7 to 2.9 and so the PH has to be increased. This, it has been found, can be easily done with sodium bicarbonate (baking powder [actually this is baking soda - JTE]). In this particular case it was found that the addition of 20g of sodium bicarbonate/litre of juice gave the required pH adjustment.

    Return to ToC

  3. Recipe Templates and Tricks
  4. These are templates which can give you ideas for unusual gifts, or really unusual jams and jellies. YMMV.

    A.2.1 Sweet, gelled, fruity, cannable things 101 as taught by: May I have your attention, please? Ms. Schaller, Famed Fruit Spread Preserver, will now conduct a seminar on The Proper Terminology of Preserves. This seminar will be worth .5 CEU credit. There WILL be a test. It WILL count.

    Preserves:
    The broad category AND a specific product: Whole fruits (or similar-sized cut pieces of fruit too large to be done whole) preserved in a thick sugar syrup varying in viscosity from that of honey to soft jelly, so that the fruit retains its shape.

    Jelly:
    The jelled *juice (only)* of the fruit or vegetable. A prize-winning one will be clear, lacking crystallization, and will be firm enough to hold its shape outside the jar, yet will be soft enough for easy spreading.

    Jam:
    Will contain fruit bits. Fruit prepared for jamming is typically crushed or chopped and cooked with sugar. Pectin may be added to assist the jel. A leetle softer than jelly.

    Butter:
    The smooth pureed pulp of the fruit, cooked and sweetened until very thick. Often enhanced with sweet spices. Must be cooked slowly. Refer to FAQ for sad stories and a couple good recipes [look down :)--LEB].

    Conserves:
    Jam-like combinations of two or more fruits, traditionally without added pectin and traditionally containing nuts and raisins. YMMV. A good one is on the soft side.

    Marmalades:
    Soft fruit jellies, typically citrus products, containing small pieces of fruit or peel evenly suspended in the transparent jelly.

    Good definitions from the Ball Blue Book.

    A.2.2 What is the scientific formula for making low sugar jam/jellies? --Mary Going

    From our expert in low sugar jams, Sandy Fifer :

    ---Proportions, from Sandy Fifer ---
    I decided to type in my recipes for all the jams I've made. Remember, these depend on using Pomona's Universal Pectin, which doesn't require sugar to set the jam. And one box of Pomona's will last for 3 to 5 batches of jam (where one batch equals 5 cups of fruit).

    Pureed fruit           Sugar    Lemon juice   # tsp. *each* of   Optional
    pectin & calcium
    Strawberries: 5 c.     7/8 c.   2 Tbsp.       2 tsp.
    Raspberries: 5 1/2 c.  2/3 c.   2 Tbsp.       2 tsp.
    Cherries: 5 c.         1/2 c.   2 Tbsp.       1 3/4 tsp.
    Marionberries: 6 c.    3/4 c.   2 Tbsp.       1 3/4 tsp.
    Blueberries: 5 c.      1/2 c.   2 Tbsp.       1 1/2 tsp.          lemon
    zest
    Peaches: 5 c.          1/2 c.   2 Tbsp.       2 tsp.
    Plums: 5 c.            3/4 c.   2 Tbsp.       2 tsp.
    Apricots: 5 c.         1/2 c.   2 1/2 Tbsp.   2 1/4 tsp.
    Pears: 6 c.            1/2 c.   2 1/2 Tbsp.   2 1/2 tsp.          1 tsp. fresh
    ginger, grated
    Yield: 4 to 6 cups of jam, depending on conditions.
    

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    A.2.3 Fruit butters in general, and apple butter in particular...
    From: Barb Schaller
    Re cooking and doneness of fruit butters, this from Farm Journal Freezing and Canning Cookbook, Doubleday, 1964:

    1. Measure the pulp and sugar into a large kettle; add the salt. Boil rapidly, stirring constantly to prevent scorching. As the butter becomes thick, lower heat to reduce spattering.
    2. Add spices and lemon juice, if used.
    3. ***Continue cooking until butter is thick enough almost to flake off the spoon, or as Grandmother used to say: "Until it is thick enough to spread." Another test for consistency is to pour a tablespoon of the hot butter onto a chilled plate -- if no rim of liquid forms around the edge of the butter, it is ready for canning.***
    4. Pour into hot jars and seal. Process pints and quarts in hot-water bath 10 minutes.

    That said, let me say this about that: This is not a fast project. Time and patience are everything. I do not bring my pulp to boil over high heat; medium high at best, watching and stirring diligently to it won't stick and scorch. Then reduce the heat! A mesh spatter shield is invaluable to me when I do this because the pulp thickens as the liquid evaporates; as the pulp thickens the spattering increases; covering the pan to protect from spattering hinders evaporation. The closer you think you are to "done," the more attention you'll want to give it. Too-fast cooking at too high a heat will caramelize the sugar in the recipe and leave you with something akin to jam. Trust me on this; I've ruined more than one batch of apricot butter in my time. Additionally, I'd process them longer than the 10 minutes, especially if the butter is less than boiling when it's put into the jars -- I had a couple of jars not seal. The butter is dense and takes longer to heat through to ensure the seal.

    The butter can also be baked (a fine alternative, especially if you're in a cool climate and welcome the warmth of the oven). Pour the seasoned and sweetened pulp into a shallow (9x13 inch pan minimum) pan -- or a shallow roasting pan. Bake at about 325 degrees F until thick, stirring every 20-30 minutes so an evaporation-induced crust doesn't form on the top. Not as complicated as it might look. Wonderful treat. Worth the effort.

    Apple Butter Recipe
    It's what I did. And I actually *measured* things. :-)

    12 cups apple pulp (I used locally grown Haralsons)
    3 to 4 cups sugar (begin with 3, I added the 4th to my taste)
    3 tsp. ground cinnamon
    1/4 tsp. ground nutmeg
    1/8 tsp. freshly ground allspice
    1/2 tsp. ground ginger
    1/4 tsp. ground cloves (do not overdo cloves; taste can be overwhelming)
    1/4 cup white vinegar

    1. Make pulp: Core but do not peel apples. Cook slowly with about an inch or two of water added, stirring to prevent sticking. Put through a food mill to make pulp. If you use more water and boil the heck out of them, do drain in a colander to eliminate the extra liquid.
    2. Measure pulp into at least a 6-quart dutch oven, stir in remaining ingredients and cook slowly, uncovered, for several hours to desired thickness. Feel free to correct the spices to your taste; adding in cautious amounts.
    3. Can in hot, sterilized jars, process in boiling water bath maybe 20 minutes.

    If my schedule requires it, I make it a two-day project. It sits fine overnight, covered.

    Use imaginatively: I use as a condiment as often as a bread spread; we like it with roast pork or chops. I swirl it into my cream cheese coffee cake filling. If it's thick enough, fill a cookie with it.

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    A.2.4 Conserves
    From: Leslie Basel

    Conserves are multi-fruit preserves, sometimes with nuts and/or raisins. My grandmother once told me that anything more than three different fruits in anything is a waste--you can't taste them all, or they taste like tutti fruitti... But I really like making conserves--you can do almost any combination of fruits, as long as they are acid enough (check the FAQ above for general pHs of different fruits)-- and they're perfect for using up weird amounts of fruit, or cleaning up the leftovers from different jam projects. I suspect that name "conserve" is derived from that little operation. So without further ado, here's mine:

    Kitchen Sink Conserve
    3-4 cup whole strawberries
    1 large stalk rhubarb
    4 nectarines
    3/4 cup raisins
    1/2 cup fresh orange juice
    slivered almonds (optional)
    sugar

    1. Hull, wash, and mash strawberries. Peel and chop rhubarb. I like a very fine chop, as it keeps the rhubarb from becoming dental floss. Pit and chop nectarines. Combine strawberries, rhubarb, nectarines, orange juice, and raisins. Simmer fruit until tender (strawberry bits will not be seen in this), then take off the heat, and measure the amount of fruit/juice.
    2. The trick for nearly any conserve recipe: Add sugar to fruit mixture on a 3/4-1vol:1vol basis. (I got 5 cups of fruit, so I add 4-5 cups of sugar). And if you add a citrus juice (or even a fruit juice) instead of water, you add a little extra acid and pectin.
    3. Put fruit/sugar mix on high heat, boil, stir constantly. When it passes the jelly test, add the chopped nuts, stir and jar it up. I put this hot into sterilized pint jars, so I boiling waterbath-processed this for 15 minutes. Hot half pints, do this for 10. (Note, this is for sea level.)

    If you try this with almonds or any other kind of nut, be stingy with them. Nuts are not acid, so too many will invite spoilage. If you like raisins, add as many as you want. Spices are great, if you have a light touch.

    Fruits that do not work well in a conserve of this type: Bananas, they get brown. Soft fruits work alright if don't expect them to be intact afterwards, otherwise they should be added last, perhaps to float to the top of the jar :). Figs are tasty in a conserve, but they are borderline acid, so you need extra citric acid or be stingy with them. Citrus works okay *with* a little advance planning; you need to prepare peels like you would in a marmalade (see recipe below). Raw citrus peels are very bitter and icky. Stone fruits work great, I always add at least one into a conserve. And its always great to have a few slightly underripe fruits in the conserve for pectin and acid.

    So here's a place where you can be creative, and one-up your grandmother. Who knows what family recipe you'll brew up?

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    A.2.5 Fruit preserves
    From: edeckerNOSPAM@inforamp.net (Eric Decker)
    Subject: Pear Preserves

    Wash. Cut the pears lengthwise in halves or quarters. Remove stems, core. Peel the sections. Treat pieces against oxidation with a solution of 1 tsp of ascorbic acid per cup of water. Make enough so the effectiveness of the solution is not exhausted.

    Make a thin or medium syrup according to taste.

    Syrups:
    Thin: 4 cups water to 2 cups sugar
    Medium: 4 cups water to three cups sugar
    Heavy: 4 cups water to 4 and 3/4 cups sugar
    Combine the sugar and water, bring to a boil, skim off the froth as required.

    If using a sweet pear use thin, medium syrup for a less sweet pear. Simmer the fruit in syrup for 2 minutes. Remove from heat. Remove the pears from the syrup; put the syrup back on to boil. Fill sterile jars with pears leaving 1/2" of headroom. Add boiling syrup, leaving 1/2" of headroom. Wipe down the jar lips with a clean damp cloth. Apply lids - bands finger tight. Process in Boiling-Water Bath: Pints for 20 minutes, quarts for 25 minutes.

    These preserves can be enhanced by the addition of whole cloves, caraway seed or cardamon seed prior to filling with boiling syrup.

    A.2.6 Anyone out there have a recipe, or any tips for marmalade?
    From: Patricia Hill .
    My recipe for blood oranges or for any of the citrus fruit marmalades is easy.

    Citrus marmalade
    Use lemon, limes, grapefruit, kumquat, oranges, tangerines, ugly fruit, tangelos

    1. Mix the fruit if you please or keep separate. Cut the fruit in halves or quarters and add water to barely cover. Simmer for 1 1/2 hours, adding water as needed.
    2. Remove the fruit from the water. Cut into thin shreds, chop or however you like it. I like thin shreds and find it is easier for me to do it AFTER cooking. My sister-in-law likes to cut it BEFORE cooking. Add the fruit shreds back into the water.
    3. Measure the fruit and water mixture. For every cup you have add 3/4 cup sugar.
    4. Cook over a hot flame until it reaches the jelly stage.
    5. Put in clean jars and seal.

    After it has jelled, you can add a little flavor. Lime marmalade with a little Club Raki (a licorice flavored liquor) is great. Lemons with a bit of scotch is good. Orange with a little Kirsch. This makes a firm marmalade so you can actually dilute it a little. If you want more flavorings, add them to the pot before it jells.

    Once we went to the store and bought some of every different type of citrus fruit they had. We cooked each fruit in a separate pot. After cutting we mixed the shreds in all sorts of combinations. We made some chunky and some thin shred. We put all sorts of flavorings in. They were all good.

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    A.2.7 Tea jelly
    from Michael Teifel :
    I made a half litre Earl Grey tea 4 times stronger than normal. And I simply added 500 grams of a commercially available sugar/pectin mixture and followed the instructions for making jelly out of juices. It tastes real good, nearly the same taste of the jelly from the mail order tea shop I tasted before. The next time I will reduce the amount of sugar so that the tea flavour will be stronger.

    For a second batch:
    I made 250 ml of green gunpowder tea with mint flavour (4 times stronger, it means 4 times more tea, not 4 times longer brewing). Then I added 150 grams of a 1:2 mixture of the sugar/pectin box (1:2 means that you have more pectin and less sugar in the mixture, so the jelly results in more fruity flavour) and added a few pine nuts. (This tea is my favourite, in Tunesia it is very common drink: chinese green tea with mint and pine nuts.) Then I followed the instructions, and it gave a very good tea jelly with a fresh flavour of mint!

    N.B. You might want to add a bit of lemon juice/apple juice for safety. --LEB

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    A.2.8 Flower jellies and jams
    from Bess Halle :

    Basic flower jelly
    Make an infusion from edible flowers. 1 pint of flowers to 1 pint of boiling water. Most flowers have a bitter bit where the petal joins the flower so you must cut that part off. I use scissors and just trim the petals of flowers, leaving the points attached. (though once I actually snipped the points off 2 quarts of rose petals....tedious beyond belief!)

    2 C flower infusion
    1/4 C lemon juice
    4 C sugar
    6 oz liquid pectin
    *optional; few drops food coloring

    Mix infusion, lemon juice and sugar in stainless steel or enamelware pan. Bring to hard boil you can't stir down. Add liquid pectin and return to hard boil. Boil at this temp. 2 minutes. Pour immediately into hot sterilized jars and seal. Process for 5 min in waterbath. Makes 4-4.5 cups of jelly.

    I've found liquid pectin works better with flowers (and herbs) than the powdered kind. You CAN make jellies with flowers and juice and I often make an apple mint jelly with apple juice and apple mint. My favorite herb combination, though, is lemon mint, made with 1 cup lemon verbena infusion and 1 cup spearmint. I never use the food coloring because I like the pale yellow and gold and pink and ruby colors. You can also pour the jellies into pretty wine glasses or other pretty glasses and seal with paraffin. [No, don't use paraffin. See, for example, Part 2 of the FAQ --JTE]

    P.S. The word from the wine making group (where I first got the idea to make honeysuckle jelly) is to wash the blossoms first. This is probably a good idea because I made a batch of honeysuckle jelly over the weekend and there was an awful lot of pollen in the flowers. The jelly tasted like honey, btw, and quite good...not at all lemony, but not enough of the actual honeysuckle flavor I was aiming for. I'll probably increase the proportions next time.

    Here's another rose petal jelly recipe which makes more jelly.
    2 quarts rose petals **see note below
    2 quarts water
    1/4 cup lemon juice
    7 cups sugar
    6 oz liquid pectin

    Boil petals in 2 quarts of water with the lid on, till 1/2 liquid is gone. Measure out 3 cups liquid. (save the remaining cup!!) mix with lemon juice and sugar. Bring to rolling boil. Add liquid pectin (this will be 2 packages of the liquid certo brand) and bring back to hard boil. Boil 2 minutes and pour into hot sterilized jars. Seal in preferred manner.

    I use the little 4 oz jelly jars so that I can give away a lot. This makes about 15 little jars.

    The remaining cup can be mixed with a 1 cup infusion of a favorite herb like mint or lemon balm and used in the previous recipe. I also boiled a cinnamon stick in with the jelly-making part (not the first boiling of petals) I think because I heard of a restaurant called Cinnamon Rose and the name stuck. Anyway, at first the cinnamon seemed a little strong. A friend said the jelly tasted like the apple pie from heaven. BUT after opening a sealed jar a few days later I DID detect both the rose and the cinnamon flavor. Be sure to discard the cinnamon stick before bottling.

    **I've used less and I've used more, so the exact proportions probably don't matter. In fact, even when I pick them at night when I get home from work, and they have little scent, cooking them brings it out a lot. Just remember, for a good red color you will need some red roses and also remember..
    ..the rose brew will stain your hands, your sink, your clothes!!!

    A.2.9 Canning Cake and Quick Breads - Don't Do It!

    Canned breads and cakes are not recommended for home cooks or canning; choose cake or bread recipes that you can freeze. Many cake and quick bread recipes contain very little or no acid and thus have the potential for supporting the growth of hazardous bacteria, such as Clostridium botulinum, if they are present inside the closed jar. C. botulinum causes an often fatal food borne illness, called botulism. Given that many of these bread and cake recipes have been shown to be low in acid, the major barriers to prevent microbial growth are limited to: (1) the dryness of the product and (2) the lack of oxygen inside the closed jar (because of vacuum seals). Recipe variations such as the addition of fruit, zucchini, liquids, etc. all contribute to available water for microorganisms to use. In addition, lack of oxygen alone does not prevent the growth of all harmful bacteria. The vacuum seals do not remove all oxygen, so some would still be available to the bacteria which do need it.

    Source: Cooperative Extension Service, The University Of Georgia College of Family and Consumer Sciences and the College of Aquiculture and Environmental Sciences Cooperating
    http://www.uga.edu/nchfp/publications/uga/uga_can_breads.pdf

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  5. General Ingredient Questions
  6. A.3.1 I am curious; why do some jam/jelly recipes call for a little bit of butter/margarine? --Andrea Midtmoen Fease
    From: Anna Welborne

    My dad always told me it kept the foam quantity down. That seems to be pretty much true, as I tried leaving it out of the strawberries this last summer, and had more foam. [BTW, for a beginner, cutting down on the foam is helpful. Less foamy jam gives a more accurate reading for your candy thermometer; too much foam is hard for a beginner to control.]

    A.3.2 Sugar
    Unless specified otherwise, sugar is granulated sugar. Dissolves easily, easy to pour and measure, and all the recipes are calibrated to its volume to weight.

    A.3.3 I'm looking for sources of pectin, like bulk pectins or low sugar pectins.
    Bulk pectins, low sugar pectins, citric acid, from Dirk W. Howard : Pacific Pectin Products, P.O. Box 2422, 40179 Enterprise Dr., 7B-D, Oakhurst, CA 93644 (209) 683-0303.

    Low sugar pectin, from Sandy Fifer : Pomona's Universal Pectin, Workstead Industries, P.O. Box 1083, Greenfield, MA 01302 (413) 772-6816.
    Another source for bulk pectin, from both Zlotka and Kai :
    Home Canning Supply & Specialties, PO Box 1158, Ramona, California 92065 (619) 788-0520 or FAX (619) 789-4745. 1 (800) 354-4070 for orders. They sell 10# of regular pectin for $75.15 plus shipping (1995 prices--LEB). Call and talk to them; nice folks.

    A.3.4 Where can I find me some citric acid?
    From Jeff Benjamin , rec.food.baking:
    If there's a home brewing shop in your neck of the woods, try there.

    From Joel Ehrlich , rec.food.baking:
    King Arthur's Flour. Most places which sell it for baking identify it as "Sour Salt".

    From several in rec.food.preserving: Safeway. Food Lion. Look in the kosher or ethnic Jewish aisle where it is often sold as "Sour Salt". Ask around.

    A.3.5 Where can I find a modified starch called Clear Gel/Jel A?
    From Carol Nelson :
    Here are some sources for Clear Jel in western Oregon. I have no idea if they will mail order, but it won't hurt to give them a call. Our local Extension offices sell Clear Jel for $2.00/pound for an idea on price.

    Captain Albert's Good Things, 254 Commercial, Salem, Or (503) 364-6511

    Friedman's Microwave Store, 1120 Lancaster Dr NE, Salem, Or 364-0538 or 1-888-380-4372

    Burrow's Country Store, 635 Wallace Rd NE, Salem, Or (503) 585-2898

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  7. General Equipment Questions
  8. A.4.1 What kind of equipment do I need to can foods at home? Don't you need a lot of stuff?
    If you cook, you probably already have most of the stuff that you need to can (jar) high-acid foods. Basically, you need canning jars and 2-piece lids (lids and rings), a large kettle or stock pot that you can boil water in, several saucepans, measuring cups and spoons, light tongs (to pick up the lids and rings), ladles, stirring spoons (stainless steel the best), an accurate timer, clean towels, a cake rack, and canning tongs.

    As you get more involved, other helpful tools are: canning funnel, clip-on candy thermometer, lid lifter (a plastic rod with a magnet at the end of it), boiling waterbath canner, preserving pan, and a pressure canner (not a cooker). 2-piece jars can be found in the grocery, supermarket, and hardware stores, while canners, canning tongs, jar lifters, and canning funnels can be gotten at the local hardware store (or Walmart). Lots of equipment can also be obtained at yard sales, check out the Specific Equipment Question section for more information.

    What you really need is a desire to can food, and a bit of a perfectionist streak. Carelessness, disorganization, and inattention cause most problems.

    A.4.2 What's a preserving pan?
    A wide heavy-bottomed pan but with relatively shallow sides. A large saucepan will do when you are first starting out; many recipes call for a 6-8 qt heavy sided pot. The idea here is that you want to heat your jams and preserves quickly and evenly throughout. If you treated your preserves like soup, say, filling a small saucepan, the top of the jam would be undercooked and runny while the bottom layers of jam would be overcooked and chunky.

    A.4.3 My grandmother always reused commercial jars and sealed her jars using paraffin. Should I do this too?
    Nothing against your grandmother, but usually you don't want to use "onetrip" commercial jars for canning. Sealing jars with paraffin is also counterindicated, because mold and other spoilers can slip in between the paraffin and the side of the jar. Even a common trick of turning the jar upside down to "sterilize" the top is not advised. [More on this below.] (Use a boiling waterbath for about 5-10 minutes instead.) Food preserving technique "rules" tend to change every few years, due to new knowledge about microbiology and mycology, and due to rigorous testing of food preservation recipes and techniques by many state extension services. Keep up to date!

    A.4.4. Can I invert my jars instead of using that nasty waterbath thing? (Nope!)
    From: edeckerNOSPAM@inforamp.net (Eric Decker)
    PFB (Putting Food By) says: "and NEVER invert processed jars in the mistaken idea that you're helping the seal - quite the contrary!" Page 264 of PFB, 4th edition debunks (in my opinion) the 1/8" Inversion theory. My comments will be indicated as [E.D.]

    "Unsaid in the news release but voiced by staff responding to telephoned queries to the GF Consumer Center in White Plains, New York, the benefits are that the jam/jelly - being still at a temperature to destroy spoiler micro-organisms - will sterilize the underside of the sealing disk, and the little amount of air trapped under the lid. [How filthy are the lids and jars before use? E.D.]

    A vacuum can form if the jars are hot and the contents are about 165F/74C. But it won't be a STRONG vacuum, because any amount of air left in the jar will invite growth of mould eventually - even though the jar is technically sealed. While a vacuum formed for us at PFB using the "inversion" method, the "inversion" vacuum was not so strong as the vacuum seal on the B-W treated jars. This fact is a reminder that the "finishing" Boiling-Water bath was welcomed by scientists in the South, to counteract heat and humidity of storage in the region; and soon it was adopted for dryer and more temperate climates. [I'd vouch for this: I've canned in Seattle, where seals formed easily, and in Tucson and North Carolina, where the seals took their own sweet time in forming. Give me that finishing waterbath every time--LEB.] At the same time, food scientists determined that 5 minutes in a B-W bath was adequate (instead of a longer time advocated earlier) to strengthen the seal and drive air from the headroom, and sanitize the surfaces where micro-organisms could have lit.

    Presumably the reason for standing the jars on their heads is to hold the hot contents against the head and the sealing disk to equal the action of the 5 minute B-W Bath. A further help would be to deal with floating fruit as the medium gels; turned back upright, the contents would shake down by themselves. The same results can be got by giving the jars a twirl several times after they're set aside to cool upright after their bath." (Note: in filing and capping the jars, we at PFB must have left the bands a bit loose. After we inverted it, one jar spurted hot, hot jelly over a hand in a mean scald. This indirect hazard can also make "inversion" less than foolproof.)

    "PFB is not gainsaying General Foods just to be tiresome; we, too, used to advocate the quick "inversion" with almost non-existent headroom--(though never setting the jars upside-down, regarding this practice as harking back too far to old-time ways with preserving)--so we reverse our own recommendations, too.

    Postscript: extension food scientists whose work we admire have expressed their worries over the "inversion" technique used at high altitudes and they are against it.

    Post-Postscript: General Foods shows fairness in their news release in saying they will continue to mention B-W Bath method as an alternative on all their printed materials." [Conclusion: I feel it gives a false security to the user of the "inversion" method. Neophytes especially are at risk with this method for they do not have the experience to make valid food judgements. Far better then, to master the basic proven techniques that work under all circumstances. E.D.]

    A.4.5 My dishwasher sterilizes jars, right? (No.)
    An argument against thinking the dishwasher sterilizes, paraphrased from Sandy Fifer :
    The water in the dishwasher is only as hot as the hot water setting in your water heater. Most are set at power saver settings, 130F or so, hottest settings are at 145F. Unless you set your water heater to 212F, you're deluding yourself.

    And from Eric Decker :
    The typical dishwasher has an accumulation of crud in the bottom that you don't even know is there. Unless the bottom spray device is removed you have not seen the scraps of food which have not yet dissipated to nothingness and passed through the filter. The dishwasher is not a suitable device for preparing canning jars for use unless one adds an active anti-germ agent such as chlorox [bleach].

    Develop good habits. The processes for sterilization of jar and lid must be inviolable and independent of the canning process itself. My grandmother didn't have a dishwasher so she scrubbed her bottles in a hot lye solution, rinsed them in soft running water, then plucked each one of them from a pot of simmering water to use immediately. It may seem silly to iterate it but she always put the mouth of the jar to the bottom - the inside was sealed from the outside and kept full of steam. Talk about a simple way to maintain sterility! [Since you have to use your boiling waterbath, I wash, then boil jars, hold them when I need them, then I have a ready 2/3 canner of hot boiling water.--LEB]

    As an update, according to the Ball Blue Book, page 10 (probably bought in 2001):

    It is only necessary to sterilize jars if they are used for products processed for less than 10 minutes. In this book, jellies are the only recipes processed for less than 10 minutes; hence, they require sterilized jars.

    To sterilize jars before filling, place them in a large saucepot and cover with water. Jars must be totally submerged. Bring the water to a boil; boil jars 10 minutes for altitudes at or below 1,000 feet above sea level. At higher elevations, boil 1 additional minute for each additional 1,000-foot elevation. Allow jars to remain in hot water until ready to use, removing one at a time as needed.
    Note: The dishwasher cannot be used to sterilize jars.

    A.4.6 What about zinc rings, rubber sealed jars, and other great, but antique, canning equipment?
    A great question. Check out the answer under II. Specific Equipment Questions.

    A.4.7 Ball or Kerr?
    People have used both, and people have had problems with either. In other words, whichever works for you. [They are owned by the same company --JTE]

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    A.4.8 Rings on the jar, or off?
    In the opinion of Leslie Bener, its a matter of taste, so here are her pros and cons of each side.
    Pro ring: "looks" more natural, secures the lid if you are mailing canning jars or storing leftovers in the refrigerator. She likes the ring on when she mails/gives something.
    Con ring: can reuse ring quickly, rings don't rust on jar, doesn't hide dirty threads or a weak seal. Rings have to be off if the canned good is to be judged at a county/state fair. [Subsequently, it was found that this is NOT universally true -- JTE] Rings shouldn't be removed until the seal is allowed to fully develop, about 12-24 hrs.

    Gamut of opinions:

    From edeckerNOSPAM@inforamp.net (Eric Decker)
    ... "the best canners will NEVER store food with bands on". It is a point of pride with those canners that their process does not need "nails and glue" to maintain its integrity. Get thee to an Amish or Mennonite food/bake sale...
    Yes, removing bands is the default condition in serious canning. Heck my grandmother canned a lot of meat and fish. Never did I see a banded jar in her cellar. Take a peek in my cellar: I have bottles of fruit in alcohol that have been there since 1986 without bands.
     

    sandyNOSPAM@chinook.halcyon.com (Sandy Fifer) wrote:
    What's all the hubbub about leaving the bands on after canning? When I'm done canning my jam I remove the bands, wash the jars (sometimes they're sticky from some jam leaking into the canning water), dry them, test the seal by lifting by the lid, and then loosely replace the bands. Once the jar is opened you need the band to seal it anyway, don't you? And don't you give a band with each jar when you're giving the jars away?

    And when I'm done with the jam I wash the jar and store it with the band. All of you who remove the bands--where do they spend the winter?

    From: adhdmdNOSPAM@scc-uky.campus.mci.net (Jackee)
    After our canned goods have sealed we always remove the bands, wash and use again. My father says that was what his grandmother always did, so we just do the same. They did it because they were dirt poor, why we do I am not sure.

    From: jpnanNOSPAM@prairienet.org (Jean P Nance)
    I find that removing the screw caps, washing them, and storing them dry prevents rust. It seems if I leave them on, they are much more apt to rust and rust interferes with a seal. Rust and corrosion are expecially bad in rings on pickles, where some of the acid seems to seep out and collect on the ring.

    A.4.9 What if I don't hear a pop from my jars? And is there a way to be sure they are sealed since I didn't hear that magic noise? --Nancy Delly
    From George Shirley:
    Nancy: Be sure the center of the lid is depressed, generally that means they are sealed unless some mean person pushed them all down while you weren't looking. I've found that if the lid didn't seal it will usually fall off when you remove the band, but is sealed if the center is depressed. I don't have time to listen to each individual jar.

    From Mary Delamater:
    My jars often don't pop, so I just check to see if the lids are concave. It usually happens pretty quickly after water bathing. Also, if I'm not sure, sometimes I will remove the ring and hold the jar by the lid--if it stays on, it's sealed! (Be sure to put your other hand under the jar in case it is not sealed, or you will have a big mess to clean up :-)

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    A.4.10 I'm really cheap. How can I reuse my canning lids?
    Penny-wise and pound-foolish. The botulism antiserum shot costs a *lot* more than the $10-$20 cost of a few dozen lids. As a public service, from the home office in Grand Rapids MI, the top ten Things You Can Do With Old Canning Lids....

    10.  Windchimes
    9.  Coasters for the vacation house
    8.  Really boring mobiles
    7.  Palm protectors for smashing garlic cloves
    6.  Train your pet Chihuahua to catch teeny metal frisbees
    5.  2 canning lids + 1 HD disk = yummy sandwich for your favorite USENET FAQ maintainer
    4.  With tinsnips, create several dollhouse-sized cookie sheets
    3.  Sharpen the edges, make the business end of a pizza cutter
    2.  Glue several canning lids into 1 slinky to contact those pesky Venusians
    1.  Several hundred canning lids, stitched together make the perfect dress
    for your Oscar acceptance speech...
    (those brass ones look great, much better than AMEX cards!)
    

    Seriously, there are some things you can do with old canning lids. You might not realize this, but lids and the mouths of jars/cans are of a fairly standard size. The Kerr lids for the narrow neck pints/half pints fit many commercial jars, like spaghetti sauce and mayonnaise jars, even those medium size salsa jars. I've found that the wide mouth ones fit large tomato sauce cans. It means that if you store dried peas, lentils, beans, pasta, sugars, flours, nuts, seeds, your dried vegetables, dried fruit, jerky, dried herbs, fruit leather, etc. in reused commercial glass jars, you always have a lid.

    Poke many large holes in an old canning lid, use the lid/ring/jar as a jar strainer for bean and alfalfa sprouts. If you're like me, and you cut the can lid off completely but you don't use all the contents, you still always have a lid. If your jars have great seals, and you have to completely destroy the lid of a particular home-processed can, you've still got a spare lid when you put it in the refrigerator. If your SO has a workshop, and organizes screws, nails, loose change, spare RAM chips, matches, etc in glass jars, your SO has a lid.

    Just don't can with them, and if you save old lids, mark 'em well so you don't get confused. Scratches on the top with a corkscrew do it for me--you even get planned obsolescence that way. And for god sakes, don't pawn 'em off at a yard sale...

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    A.4.11 How do I use a pressure canner safely and effectively?
    from Wendy Milner :
    As with the boiling water bath, you prepare your food according to a tested recipe, place the food in the jar, put on the two piece lid, and place the jars in the canner which has 2 to 3 inches of water in it. The water should be hot but not boiling. Place the lid on the canner. The petcock or vent of the lid is open. As the water boils, steam will rise out of the petcock. When steam is steady, wait 10 minutes before closing the petcock.

    There are two types of gauge: weighted and dial.

    The weighted gauge has three positions: 5 pounds, 10 pounds and 15 pounds. Always use the higher weight if the recipe calls for a weight in between one of these values. For example, the recipe calls for 12 pounds of pressure, use 15 pounds. The disadvantage to a weighted gauge is that food may be over processed. The advantage is that it is easy to hear the weight move during processing.

    With a weighted gauge, place the gauge on the vent using the correct weight. Leave the temperature on high until the weighted gauge begins to rock. Lower the temperature. You will have to experiment a little with the temperature. You want the weighted gauge to rock lightly throughout the processing time. Start the processing time when the gauge is rocking at about 2 to 3 times a minute. [N.B. If your gauge refuses to rock, check to see if your stove is perfectly leveled.--the gang at r.f.p]

    The dial gauge canner has a dial which registers from zero to 20 pounds. You should have your gauge tested every year by the local extension office. The advantage to a dial gauge is that you can see exactly what the pressure of the canner is during processing.

    With a dial gauge, close the petcock and watch the dial. When the dial has reached the proper pressure, reduce the temperature. Maintain the pressure throughout the processing time. Start the processing time when the correct pressure has been met.

    If you live above 1000' feet you must increase the pressure for processing. For every 1000' feet add 1/2 pound of pressure. You do NOT add time to the processing, only pressure.

    he end of the processing time, turn off the heat. Do not open the lid or vents. It will take about an hour for the pressure to drop inside the canner. Wait till pressure reaches zero, or the safety valve drops before opening the lid. Open the lid away from you. There will still be steam rising from the water and it is easy to scald yourself.

    Remove the jars from the canner. Place them on a towel on the counter and leave them alone for 12 to 24 hours before checking the seal. Do not check before the 12 hours as this could cause the jars to not seal. Sealing is the result of heating and then cooling the jars. [For more about pressure canners especially information about the vagaries of the gauges, please checkout the Equipment Section in Part 4 of this FAQ.]

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    A.4.12 I'd like some sources for non-standard size jars, decorative bottles, unusual size rings, and other items that I just can't find in the usual places.
    Zlotka :
    Berlin Packaging has a great catalog of containers for all manner of things. 1-800-4-BERLIN will get you a free catalog. Good customer service, too.

    lost the attribution here, sorry..
    You might try Glashaus. They have some big jar sizes, the largest rings I have from them are 4.25" at the outside. They are at Glashaus Inc., 415 W. Golf Road, Suite 13, Arlington Heights, IL 60005 (312)-640-6918 Fax (312)-640-6955. Plus they have really beautiful jars. The lids are held on by suction from canning, so it is extremely easy to tell if something didn't seal or has gone bad.

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  9. Troubleshooting
  10. A.5.1 My jars refuse to seal! Some of my preserved food is turning colors! What is happening?

    PROBLEMS WITH HOME-CANNED FOODS

    Even when you follow directions, occasionally you may have problems with home-canned foods. Many of these problems can be traced to use of non-standard canning jars, lids and rings or use of other-than-recommended canning equipment or procedures. Checking your equipment and reviewing current canning recommendations can go a long way towards preventing potential problems. If you do have a problem, you may be able to determine the cause and prevent its reoccurrence by consulting this "trouble-shooter's guide".

    1. Jars do not seal
      1. Off-standard jars and/or lids.
      2. Chipped or uneven sealing edge.
      3. Using one-piece caps instead of two-piece lids.
      4. Screwbands are rusty or bent providing poor contact.
      5. Bands not screwed down tightly enough before processing.
      6. Sealing edge not clean. Wipe edge well before placing lid on rim.
      7. Liquid siphons out of jar during processing taking food particles on to the sealing edge.
      8. Insufficient heat during processing--air not evacuated from jar, so a vacuum seal never forms.
      9. Lids were improperly prepared before placing them on rims--most lid manufacturers require some pretreatment (heating, boiling, etc.).
      10. Rapid, forced cooling of a pressure canner can cause a rapid pressure and temperature change inside the canner causing the liquid to "boil" out of the jars, leaving particles on the sealing rim and unsealing the jars. Canners should not be "forced" into cooling rapidly by submerging them in water or by adding ice.
      11. Insufficient processing of raw-packed food; the air may not have been completely driven out of the food leaving residual air in the jar so the seal does not form.
      12. Use of canning procedures which are not recommended such as open kettle canning, microwave canning, and oven canning. Use USDA recommended procedures.
    2. Food spoils
      1. Processing at an incorrect temperature--can occur with:
        • Inaccurate pressure canner gauge.
        • Failure to exhaust canner.
        • Failure to make altitude adjustment.
        • Heat source fluctuates--inaccurate pressure or fluctuating pressure.
        • Water not at a rolling boil when jars are put into canner.
        • Water not covering jar caps by 2" throughout processing.
        • Water not at full boil throughout processing.
        • Insufficient processing time.
        • Use of canning procedures which are not recommended--recommended procedures (USDA) are based on the time it takes to achieve a temperature which will sterilize the food in the jar.
      2. Improper cooling of jars after processing.
        • Failure to remove jars from canner when processing time is up (or when pressure gauge reads 0).
        • Failure to set jars at least 1" apart during cooling.
        • Covering jars which retains heat--vacuum does not develop.
        • Attempting to cool either the canner or the jars very rapidly.
      3. Using damaged (freeze damaged), spoiled, under ripe or over ripe food--the pH may not be correct for the type of processing you used (water bath versus pressure).
      4. Very large number of microorganisms due to spoilage, bruising, etc. A very large number of microorganisms present on the food which are not destroyed in the usually recommended amount of processing time.
    3. Food loses liquid during processing
      1. Jars filled too full.
      2. Fluctuating pressure in a pressure canner.
      3. Forced cooling of a pressure canner.
    4. Food turns dark (not spoiled)
      1. Insufficient processing time.
      2. Processing temperature too low (water not at a full boil at beginning of processing or drops below full boil during processing).
      3. Water not 2" over jar lids.
      4. Packing foods raw that should be precooked (pears).
      5. Liquid loss during processing causing fruit at the top to be out of the liquid.
      6. Lack of appropriate pretreatment for light-colored foods.
    5. Fruit or tomatoes float or separate from the liquid
      1. Using overripe fruit.
      2. Packing fruit too loosely.
      3. Syrup too heavy.
      4. Processing too long--pectin damaged.
      5. Processing at too high a temperature (pressure canner).
      6. Raw packing--food contains a lot of air.
      7. Smashing or pureeing food prior to heating it activates enzymes which break down pectin in the juice so the food pieces are lighter and rise to the top. Heat or crush while heating any foods to be pureed or food to be packed in its own juice to help prevent separation.
    ----
    Prepared by Susan Brewer/Foods and Nutrition Specialist/Revised, 1992 EHE-665
    ----

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    PROBLEMS IN HOME-CANNED FRUITS

    1. Fruit darkens at the top of the jar:
      1. Liquid didn't cover the fruit--pigments become oxidized.
      2. Fruit not processed long enough to destroy enzymes.
      3. Air left in jars permits oxidation (bubbles or too much headspace). Fresh fruit exposed to air oxidizes.
      4. Exposure to high temperatures and light during storage.

    2. Color changes in canned apples, pears, peaches, quinces:
    3. Pink, red, blue or purple color--natural enzymatic reaction (not harmful) which may occur during cooking, or a result of a chemical reaction between fruit pigments and metal ions (iron and copper). Use soft water, stainless steel cookware, plastic or wooden utensils.

    4. Fruit floats in the jar:
      1. Fruit is lighter than syrup--use lighter syrup, cook fruit before packing.
      2. Improper packing--pack fruit tightly without crushing. Use hot pack method.
      3. Fruit is overprocessed--too much heat destroys pectin and acid, so the fruit loses its shape and floats.
      4. Fruit is packed too loosely.
    5. Fruit Spoilage:
      1. Overpacking--heat penetration is poor and food does not become sterilized.
      2. Poor selection of fruit (over ripe, wrong pH, large bruises).
      3. Underprocessing--food is not sterilized.
      4. Unsanitary conditions--microorganisms are not removed from the food or larger numbers are added during preparation. Clean up as you go. Wash equipment, utensils and hands in hot soapy water.
    ----
    Prepared by Susan Brewer/Foods and Nutrition Specialist/Revised, 1992
    ----

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    COLOR CHANGES IN HOME-CANNED FOODS

    The pigments in food which are responsible for their colors are sensitive to a variety of things which they may come into contact with during home food preservation. Acids (lemon or other fruit juices), anti-caking ingredients in table salt, minerals in water, metals in water and from cooking utensils, heat, and light are a few things which can affect these pigments causing them to change color. Most color changes which occur during home food preservation do not make the food unsafe to consume--however, if the food looks or smells bad or odd, do not take a chance, dispose of it without tasting it.

    1. Blue garlic: Occurs in pickled products. Caused by using immature garlic or because table salt was used in place of canning salt. Not a safety hazard.
    2. Yellow cauliflower: Cauliflower (or other white vegetable pigments) are white in acid but yellow in alkaline medium. Minerals in the water may have created a more-than-normal alkalinity. Not a safety hazard.
    3. Yellow crystals in canned asparagus: the crystals are glucosides (rutin) which were in the asparagus cells before canning. The high temperature of pressure canning causes them to come out of the vegetables into solution, but when the food cools, the pigment precipitates out of solution onto the the asparagus. Occurs mainly in asparagus in glass jars. If asparagus is canned in tin cans, a pigment-tin complex form so the yellow pigment stays in the liquid. Not a safety hazard.
    4. Pink pears: the light colored pigments in the pears convert to pink pigments due to overprocessing or due to enzymatic reactions. Not a safety hazard.
    5. White crystals on tomato products: home-canned pureed tomato products may have crystals of calcium nitrate on the surface. They are hard and scaly unlike mold spots. Not a safety hazard.
    6. White crystals on spinach leaves: calcium oxalate--not a safety hazard. [Might want to rethink about canning spinach in the first place, see question A.1.4]
    7. White or pink crystals in grape jelly: Grapes are high in tartaric acid which goes into solution during cooking but precipitates as crystals during cooling. Prevent crystals by extracting grape juice, cooling overnight in the refrigerator and filtering juice before canning or using for jelly-making. Not a safety hazard.
    8. White, yellow, or pale red beets: the red pigments in beets (anthocyanins) are sensitive to high temperatures. Some beet varieties are especially sensitive. The pigments are converted to white or colorless derivatives. Not a safety hazard.
    9. Blue pickled beets: the pigments in beets are pH-sensitive. They are red in acids and blue in alkalis. If the pigments are blue, the pH is too high for water-bath canning to be safe. Throw the beets away (handle according to spoiled food procedures).
    10. Brown green beans: enzymatic color changes occurring before the enzymes are inactivated by heat cause the green-to-brown color change of chlorophyll. Blanching or hot-packing will inactivate the enzymes and help preserve the green color. Not a safety hazard.
    11. Brown potatoes: storage of potatoes at temperatures below 45F causes the potato starch to be converted to sugars. During high heat treatment of pressure canning, these sugars form dark brown pigments. Not a safety hazard.
    12. Colorless crystals which look like broken glass in canned sea foods. Not harmful.
    ----
    Prepared by Susan Brewer/Foods and Nutrition Specialist/Revised, 1992 EHE-666
    ----

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    A.5.2 My jams and jellies didn't set. How can I reprocess them?
    From: Barb Schaller
    Here are three ways to rescue syrupy jams or jellies.

    From General Foods, makers of Sure Jell pectin products and Certo liquid pectin.

    USING SURE JELL FOR LOWER SUGAR RECIPES:

    1. Prepare containers as you normally would have (hot jars and lids).
    2. Prepare Pectin Mixture: Slowly stir contents of 1 package Sure Jell for Lower Sugar Recipes (SJ-LSR) into 1-1/2 cups cold water in small saucepan. Bring to a boil over medium heat; continue to boil 2 minutes, stirring constantly. Remove from heat.
    3. Prepare Trial Batch: 1 cup your jam or jelly, 2 Tbsp. sugar, 1 Tbsp. Pectin Mixture. Measure jam or jelly, sugar, and the Pectin Mix into small (1-qt) saucepan. Bring to a full rolling boil on high heat; continue to boil 30 seconds, stirring constantly. Remove from heat. Skim off any foam with metal spoon. Quickly pour into prepared jar. Cover jar and let stand up to 24 hours to check set of Trial Batch. Store remaining Pectin Mix in fridge.
    4. Prepare Remainder of Batch: DO NOT TRY TO REMAKE MORE THAN 8 CUPS OF JAM OR JELLY AT ONE TIME.
    5. If Trial Batch sets satisfactorily, follow the recipe above, using the listed amounts of Pectin Mixture and sugar for EACH 1 cup of jam or jelly. (Not going to repeat previous instructions.--BS) For convenience in measuring larger amounts of Pectin Mixture and sugar: 8 Tbsp. = 1/2 cup. 16 Tbsp = 1 cup. (Even I could do that math! :-) "Remember, if your jam or jelly still doesn't set, you can always use it as a glaze or syrup."

    USING SURE JELL POWDERED FRUIT PECTIN:

    1. Prepare Containers as usual (hot jars and lids).
    2. Prepare Pectin Mixture: Slowly stir contents of 1 package SJ and 3/4 cup cold water in small saucepan. Bring to a boil over medium heat; continue to boil 2 minutes, stirring constantly. Remove from heat.
    3. Prepare Trial Batch: Same as for SJ-LSR instructions, above.
    4. Prepare Remainder of Batch: Same as for SJ-LSR above. (Same comment about glaze, too. :-)

    USING CERTO Liquid Fruit Pectin:

    1. Prepare Containers: Same as usual (hot jars and lids).
    2. Prepare Trial Batch: (Pay attention, this is different.....) 1 cup your sorry jam or jelly, 3 Tbsp. sugar, 1-1/2 tsp. fresh lemon juice (I do use fresh), 1-1/2 tsp. Certo.
    3. Measure jam or jelly into small saucepan. Bring to full rolling boil on high heat, stirring constantly. Immediately stir in sugar, lemon juice and Certo. Bring to full rolling boil on high heat, stirring constantly.
    4. Remove from heat. Skim off foam, blah, blah, blah. Quickly pour into prepared jar, blah, blah, blah. Store opened pouch of Certo in refrigerator. (Blah, blah, blah= follow standard procedure for sealing the jars, and for g'sakes, don't sneeze in the jar.--LEB)
    5. Prepare Remainder of Batch: Do not try to make more than 8 cups of jam or jelly at one time. If Trial Batch sets satisfactorily, follow the recipe above, using the listed amounts of sugar, lemon juice, and Certo for EACH 1 cup of jam or jelly.
    6. Measure jam or jelly, sugar, lemon juice and Fruit Pectin into large (6 to 8-quart) saucepot. Bring to a full rolling boil on high heat; continue to boil 1 minute, stirring constantly (this is DIFFERENT than trial batch.) Remove from heat, skim foam, ladle into jars, blah, blah, blah. After preparing remainder of batch, discard Certo in opened pouch. (Same commentary about glazes and syrup.)

    For convenience in measuring larger amounts of sugar, lemon juice and Fruit Pectin: 3 tsp. = 1 Tbsp., 8 Tbsp. = 1/2 cup, 16 Tbsp. = 1 cup.

    There! From "Gifts from the Harvest, Homemade Jams and Jellies, from the makers of SureJell and Certo." A 62-page booklet with beyond-the-basics recipes for sweet spreads. Got it as a freebie at our State Fair one year.

    A.5.3. Anybody have a way to loosen up stiff jelly?
    From: kateNOSPAM@rigel.econ.uga.edu (Kate Wrightson)

    If it's jelly, try to maneuver a biggish glob (ooh, technical term) out of the jar and into a small Pyrex custard cup. Add a tablespoon or so of warm water and microwave it until the jelly begins to melt; stir and add extra water if needed to make a smooth semi-thick liquid. This becomes a glaze for whatever sorts of meats you might cook: chicken, game birds, roasts, turkey breasts....

    The obvious combos are peach glaze on pork, cherry on pork, apple on pork (oops, and we don't even eat all that much pork; suffice it to say that pork goes well with any fruit glaze), strawberry or any berry on cornish hens, kiwi on chicken breasts, etc.

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    (end of Part 2)

    The cook was a good cook, as all cooks go; and as all cooks go, she went. --Saki