Canning -- quick question about boiling water canners
mxk3 z5b_MI
9 months ago
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mxk3 z5b_MI
9 months agoRelated Discussions
Two newbie questions about canners...
Comments (7)Illy, I agree with Bejay. While I understand the impulse to "get it right the first time," since haven't tried canning yet and aren't sure what you'll want to can, I suggest you find out more about what you like, what interests you, how you end up actually canning, before you spend a lot of money on equipment. You probably want to start with BWB canning, and if you really are going to mostly make just "a few half-pints at a time," then for BWB you don't even NEED a canner. You just need a pot with a lid that is deeper to hold the largest jars you plan to can -- enough deeper that there is room for the jars to sit on top of a rack of some kind, and that there can be water at at roiling boil covering the jars well. You may well have such a pot already. Like bejay, I found that the key wasn't the pot or canner itself but a rack for the bottom of it. Even canners that you buy often come with racks that are useless for small jars, so you will want to buy something that they can sit on --- there are nice stainless steel ones meant for this purpose available at kitchenkrafts.com & other specialty retailers, OR you can cruise the dollar and discount stores for a cake-cooling rack that fits your pot. (This will work fine but be sure not to dump your canning water or remove the rack when finished; if you leave it soaking overnight because, say, you plan to can again in the morning, I can tell you from experience it'll get spots of rust.) SO, to start your canning adventure, I actually recommend NOT buying a canner but rather measuring your pots and finding a suitable rack. If you don't have a pot already that will work, then buy an inexpensive enamel canner as bejay says --- they are less than $20. If you plan to can in small jars, I would get the smallest one I can find --- no point taking up the room for something that will hold quarts if you will never can in them (I never have; it's just me and my husband in the house so the biggest jar I've ever used is 3 cups; mostly I can in pints and half-pints.) The other things I recommend buying before you start to can (other than jars, which come with lids and rings) are 1) a jar lifter [available wherever canners are sold, usually, --- about $5 and a LIFE saver], and 2) a Ball Blue Book (also less than $10 and full of useful instructions, recipes, etc.). Then just start canning! Begin with applesauce or jam or pickles or fruit in syrup -- all easy and VERY low-risk things you can BWB. See what you like. Post to us about your adventures! If --- or when ;-) --- you get hooked, as bejay says, you may decide you want a larger canner, or a better-quality rack, or to move on to a pressure canner. But by then you'll have more of an idea of how much one is worth to you, which will help you spend your money wisely. Just my 2 cents. Happy canning! Zabby...See MoreQuestion about pressure cookers (not canners)
Comments (9)That's what I figured. While I never noticed if the water in the canner was still boiling after a natural depressurization, I have seen the food boiling in the jars. Worries me that when I just tried PCing 2C of water in the electric one, it wasn't boiling after quick release. But they won't take it back - too late, had to have done it last night. Thanks for the link, I did read that this morning before DD had to go to Girl Scouts and I went shopping, it looks like I used too much water (only supposed to use 1.5x as much water as rice) and also may have done 1 minute too long (following the manual that said 7 minutes) if it doesn't take longer to cook more rice (I used 1.5C of rice and 3C of water, and not in a bowl - that's what I used for steaming but for PCing I just put the rice directly into the PC). But I got The Pressure Cooker Cookbook by Toula Patsalis at the library today, others coming on interlibrary loan so I will get this figured out. Hopefully the electric PC will work with the recipes (I won't use the manual) and will just need a little longer cooking time due to not coming to full pressure (?)....See MoreUsing a pressure canner as a water bath canner?
Comments (14)As others have said you can use the pressure canner if it allows 2 inches of boiling water above the jars. Be very careful, however. Two years ago I was using this method and had locked down the lid leaving the vent open as JodieMo suggested earlier. A small amount of pressure had built up and when I removed the lid, the superheated water exploded up out of the canner and burned me quite badly. I still have the scars to prove it. This was a very old canner (it has since been retired) and did not contain the pressure lock that modern Presto models have. However, I will never again lock a pressure cooker lid down for boiling water processing. Either remove the seal or search for a lid that fits the pot....See MoreJars continuing to boil after removal from pressure canner
Comments (10)>> It sounds like you are relying upon an out-of-date >> manual that does not correspond to current standards. >> Generally canner manuals are re-printed year after >> year and are seldom updated. No, as mentioned above, I am using the current NCHFP guidelines, NOT the table in the old outdated manual which says I should use 5 lbs. for 10 minutes. >> Are you sure you were looking at the correct section >> of the NCHFP chart? For a weighted-gauge canner >> processing is not recommended above 1000 feet. Actually, I don't think that you are interpreting the chart correctly. As I understand Table 3 it says that over 1000 feet one should use 10 lbs. of pressure for 20 minutes or 15 lbs. for 15 minutes but NOT X lbs. for 10 minutes. http://www.uga.edu/nchfp/how/can_03/tomato_juice.html ------ I believe I'm now starting to understand the scientific explanation for my original question. Normally when you remove a small boiling pot from it's heat source it will stop boiling almost immediately because the temperature of the contents will quickly drop back below 212 degrees and since the atmospheric pressure stays the same it stops boiling quickly. As I am using the higher recommended pressure of 15 lbs, the temperature of the tomato juice is reaching 250 degrees. When I remove my pressure canner from the heat it's temperature drops quickly because it is a relatively small canner which doesn't need much water (1.5 qt) for pressure canning and there is much more air (~7 qt of air) than water. So the pressure canner cools and unlocks and I remove the jars. In the jar there is only a tiny, tiny amount of air which cools quickly and contracts creating the necessary vacuum to seal the lid. But the liquid is still very hot and now the pressure (vacuum) inside the jar is well below atmospheric pressure so the jar continues to boil even though the temperature of the liquid may drop below 212 degrees. - Steve...See Moremxk3 z5b_MI
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