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Pressure canning help ASAP - weights, but pressure climbing?

Posted by ajsmama 5b (NW CT) (My Page) on
Thu, Oct 17, 13 at 10:21

I'm about halfway through the 75 minutes processing time for meat (pints) and the 10 lb weight is rocking steadily but not furiously, I know I can't trust the gauge but in shorter processing times it registered 10.5 - 11 psi when the weight was rocking, now the reading is pracitically at 12, gauge is steaming up on the inside. I know there must be some tolerance that the weights are machined to, but how high do I let this go before I turn the heat down? I know the weight set should limit the pressure, but it seems to be getting a little high for my peace of mind.

Worst case I know the overpressure plug should blow, and I really think I should turn down the heat before it even gets to 15 psig on the gauge (I'd think the weight would be spinning/rocking like crazy by then), but has anybody ever had this happened? Should I be concerned?

And yes, I have a ring sitting right on the counter, so I don't have the 15 lb weight on...

Thanks


Follow-Up Postings:

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RE: Pressure canning help ASAP - weights, but pressure climbing?

  • Posted by digdirt 6b-7a North AR (My Page) on
    Thu, Oct 17, 13 at 10:40

Should you be concerned? No. Look at it this way. Many people have to pressure can everything at 15 lbs and do so all the time. So why would you fear the over-pressure plug is about to blow when you are only "practically about 12?

The whole point of weights is that you ignore the gauge but IF your gauge is accurate and IF it is reading 12 then you could turn the heat down a smidge - a 1/4 of a number on the stove. But no you don't have to unless the weight begins rocking wildly.

Dave


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RE: Pressure canning help ASAP - weights, but pressure climbing?

ajsmama ... weight system is goof proof when it comes to safety. Though, the "10 LB" weight may not control the pressure at EXACTLY 10 lbs. I have read a lot of people mentioning that their gauge shows 10.5 to 11 lbs.
I think with the weight system, existance of a gauge is unnecessary but even confusing and it is just an added wasteful cost that the consumer has to pay.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

I realize the weight set shouldn't let the pressure build to the point where the overpressure plug blows, but I didn't know how high it would go (up to 15? If I have a defective weight for some reason?). I know people process at 15 psi and actually since I'm at 997ft I don't mind it being a little high (if it is, I know I can't trust the gauge), just thought it strange, and being a newbie a little alarming, that after more than 30 minutes of processing the pressure would be climbing when it had stayed pretty constant for the first half of the time.

I smell cooking meat combined with vinegar I put in the water - is this normal? I don't want to end up with overprocessed meat, or jars that don't seal. I've been afraid to touch the dial b/c I know big drops in pressure can cause failure - and with only 10 minutes left to go and pressure not going any higher (I'm watching it like a hawk, sitting at the breakfast bar across from stove) I might as well just leave it at this point. But wondering what I'm going to find when I open the canners and the jars...


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RE: Pressure canning help ASAP - weights, but pressure climbing?

You might see some siphoning, but I wouldn't worry about it. Make sure you have an 'escape' path, not towards the canner, just in case it blows. We had one to blow, my vent was blocked. It went straight up, low ceiling and now have a dent in the dropped ceiling tiles, but the steam fill the very small kitchen. Hubby was caught inside of the room without an escape plan, he won't do that again. Of course, we are in a different kitchen with more room to escape (2 doors easily available).

Just like baking a roast, you should be able to smell the meat cooking (that is what it is doing) and the vinegar in the pan is cooking also.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

OK> I don,t think there can be such a thing as "DEFECTIVE" weight. It is just a dead mass. The only variable is its weight and the vent's outlet diameter.Together it determines at what pressure it is vented. There should be some tolerance range.
( 10 lbs =/-1lbs)

ONE more thing. From my experience with pressure cooker, meats can/may produce foam and clog the vent and other safety systems. But this should not happen in canner.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

No, no foam. I supposed a weight could be defective if machined out of tolerance - hence my question why and how high it should be climbing half an hour into processing - if weights were machined 1/2 lb - 1lb "heavier" (based on the area they cover, obviously a 5lb ring doesn't weigh 5 lbs) then there was the possibility that I spent all that time coming up to pressure (though it only took 20 minutes - remember raw pack - to come up the first 10.5lbs) for a 12 lb weight, and I don't know the ramifications of that, if I was supposed to use 12lbs I know it would be considered severely underprocessed. Since I am only supposed to use 10 lbs at my altitude, I think it's OK.

Timer going off now for the 10-minute wait - let's see how they look (I think a jar tipped over when I moved the canner off the burner).


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RE: Pressure canning help ASAP - weights, but pressure climbing?

Jar didn't tip, just clunked together I guess. All appear to have sealed though boiling like crazy right now on the rack. Since I didn't use any liquid in the jars, I don't know if you can call it siphoning, maybe the jars have more HS b/c the meat cooked down and some pieces/jars might have been less juicy? Some meat above the liquid - maybe I can get those to settle down tomorrow after they've cooled, will use those first.

But some lids look like some residue on them? Was this caused by big change in pressure when I took the canner off the burner? Wondering if that's what caused the siphoning in my tomato sauce too?

Half the water is gone - I used a gallon instead of 3 quarts the manual said, 3 qts just won't reach the fill line even with the rack in, a gal was just a hair over the line. But boy, for 90 minutes (or 100 if I ever do seafood) I think I'd want more than a gallon in there so as not to run the canner dry.

Will post pix as soon as my Photostream updates - I had to plug in the iPad.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

OK, here are the pix - maybe the black stains on the silver lid are from aluminum? But gold lids (yes, I had some old ones clean so I used them, still have red compund not gray) look like broth residue?

6C of water left in canner (out of 1 gal) I poured it into measuring cup to be sure, it was clear, smelled a little of beef but didn't look at all like broth.

The 2 fullest jars were the last ones packed - meat from the bottom of the ziploc bag that had been sitting in its own juice all night in the fridge. The jar that had the least liquid was the first one packed - from drier meat at the top of the bag. Maybe it would have been juicier if I had cut the meat and packed the jars immediately? I dumped the juice/blood from the bag when I was done filling jars - I know the NCHFP says not to add liquid, but should I have added a little to the first couple of jars packed (or swished the meat around to distribute in the bag, wet all the pieces, before packing the jars)?

So am I going to have to discard the meat that not submerged when I open the jars?

I'm disappointed in the results of this experiment, next time I will brown (in the oven) and add water (if making it for use in chili, can I use my own tomato juice or must it be commercial?).


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RE: Pressure canning help ASAP - weights, but pressure climbing?

I don't know how to post more than 1 photo w/o using Photobucket and I haven't time to upload - have leaves to bag.

This one does look like it has meat residue on the ring, but the canner water was clear??


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RE: Pressure canning help ASAP - weights, but pressure climbing?

obviously a 5lb ring doesn't weigh 5 lbs) then there was the possibility that I spent all that time coming up to pressure (though it only took 20 minutes - remember raw pack - to come up the first 10.5lbs) for a 12 lb weight, and I don't know the ramifications of that, if I was supposed to use 12lbs I know it would be considered severely
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The weights REFERS TO how much pressure they hold before venting.
Sure , they can be machined out of tolerance. But every manufacturer and assembler has a quality control system that regularly sample and check routinly. Also, it is not just the weight. The diameter of the vent outlet is also a factor. lets say that it has an 1/8 of an inch diameter (= 0.0123 in.sqr). a 10 lbs internal pressure will lift a weigh roughly 0.123 pound or 2 oz or 56 grams. So to get a 15lbs pressure you will need a 3 oz weight. So it is the combination of the weight and the hole .

(JUST AN EXAMPLE. your pc can be different)
inner diameter that the weight sits on it.

That is why, once these physical parameters are set, it will ALWAYS produce the same results.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

Your canner was too hot and some of the broth siphoned due to inconsistent pressure (i.e.pressure climbed abruptly). You have to monitor very carefully and as Dave said, tweak it down 1/4 turn or so. Don't go for huge adjustments in the setting just small gradual ones until the canner calms down a bit. Ideally you would have started lowering the temp when you first saw that the pressure was climbing.

I've said this before but it bears repeating. The weight is not machined to 10 but 10.5 which is the pressure determined to kill botulism spores. It's labeled 10 for convenience but if your gauge back-up reads 10.5 it's spot-on.

Gauge canner instructions say 11 so that extra half-pound is already there also. One instruction rounds down and one rounds up.

The meat is fine to consume but you may have some slight dryness or darkening of the meat which finished above the broth. It's not as "pretty" but it's safe.

Carol


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RE: Pressure canning help ASAP - weights, but pressure climbing?

The meat had juices inside and that's what your liquid is. I always have a little bit of residue on the lids, I think it has to do with my water. I do remember that the one time that the vent plugged was after doing the meat, be sure to check that after done.

I fill to the line and before I found the line, I filled to 1/2 of pint jar level. Yes the water does disappear. I don't take my canner off the burner (can't lift it full), just turn the burner off. It takes longer to cool down, since I'm using electric (when i had gas, no problem)

Yes a weight could be defective, not milled correctly, but that's what QC (quality control) is for. I'm sure they run all the weights over a scale and anything off would get rejected. That's in a perfect world.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

  • Posted by digdirt 6b-7a North AR (My Page) on
    Thu, Oct 17, 13 at 14:29

Your results look perfectly normal for raw packed meat - yet another reason why I never use raw pack. Of course the meat shrinks and of course it makes juice in the jar, and no it will never fill the jar with juice but that doesn't mean you had siphoning. You may have had some because you haven't yet learned how to balance your heat source. But all those issues are pretty standard with raw packing and why it isn't recommended. So the simple solution is just don't do it.

As to pressure canning, when new to it, one can imagine all sorts of dire problems and consequences when in fact few exist.

But tossing scare stories and dumping more info that isn't even relevant to pressure canning on that person doesn't help. Foaming applies only to pressure COOKING not canning and then only when the pressure cooking is done improperly. Weights work, gauges don't. Weights are not improperly machined and a 10 lb weight is machined to 10.5 just as Carol said. But they can be used improperly. Vent pipe diameters aren't relevant unless they are plugged and weren't checked first and they vary from brand to brand anyway. Properly maintained and operated canners do not blow up.

So other than that you used raw pack and are new to pressure canning and need more practice at controlling your heat source everything is perfectly fine and normal.

Dave


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RE: Pressure canning help ASAP - weights, but pressure climbing?

I do remember Carol saying weights were actually 10.5 lbs not 10 (when you use the single ring with the 5lb base). So assuming the 5 lb base really is for 5 psig (and yes I realize it depends upon the area that it's covering, which is why it will vary from manufacturer to manufacturer), then since I can't find any markings on the 2 rings I assume they are identical - 5.5 lbs each so 15 lbs should really result in 16 psig. Or maybe the base is really 5.5 psig (I haven't run it alone) and each ring is 5 so it would be 15.5.

I just figured that if the weight was acting to limit the pressure that no adjustment should be required for the burner - though of course I wouldn't want it too high and rattling around like it was going to fall right off. But I didn't think it would go over 11 since it hadn't when I was processing for shorter times.

I was getting worried that my weights were possibly out of tolerance, of course as I keep saying I know the gauge can't be trusted, but wondered why pressure started to rise after being steady for 1/2 hr. I didn't think my burner would be getting hotter - if anything I expected it to cycle. But next time I will turn it down a hair if you think that's what caused siphoning. I just started it on 8 and left it rather than starting it on High (10) and turning it down since I don't know if that's what caused my tomato sauce to siphon (and also since I was proecssing longer and expected the burner to cycle and I didn't want to have it turned too low when it did).

Or was it moving the canner off the burner and the large immediate drop in pressure that caused it both with sauce and meat? I know instructions say to move it off electric burner but I didn't have siphoning with colored water, I had canner full of quarts those times so I left it on the burner and pressure dropped much more slowly.

Pressure went from 10.5 when I started timing to 11 steadily let's say, I didn't time how long since I didn't think it was a problem. Stayed there for about 1/2 hr, then it went very quickly to 11.5 right at about 35 minutes. I wasn't sitting there staring at the gauge for those first 35 minutes, just glancing up every now and then from across the room so I really don't know how quickly it climbed but then it did inch up to about 11.75 (best I could tell with the condensation inside the face - another thing I was wondering if was normal) as I watched. Is say 0.5psi jump all at once too much?

Was it siphoning (or whatever correct term is when you don't start with any liquid in jars) if the water as clear? Or was it just kind of dried-out meat from the top of the bag in those jars?

Should the jars have 1" HS filled with liquid all the way to top when done processing, assuming fresh-cut meat and no large pressure changes?

Thanks for helping me figure this out. I wish I had someone nearby who could be right here in the kitchen with me and teach me to PC, but you here are the next best thing.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

Thanks Dave, we were typing at the same time. Still wondering if the real problem was that I took the canner off the burner, not that pressure rose 0.5 psi from 11 to 11.5 pretty quickly. I'm afraid I'd make it drop more than that fiddling with the knob!

Yes, learning curve here with the electric stove.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

But tossing scare stories and dumping more info that isn't even relevant to pressure canning on that person doesn't help. Foaming applies only to pressure COOKING not canning and then only when the pressure cooking is done improperly. Weights work, gauges don't. Weights are not improperly machined and a 10 lb weight is machined to 10.5 just as Carol said. But they can be used improperly. Vent pipe diameters aren't relevant unless they are plugged and weren't checked first and they vary from brand to brand anyway.(Dave)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

First of all I am not the on who is spreading scare stories here.
and rules every thing to be tossed.
Second: I said foaming occurs in pressure cooker(when cooking meats ..). But then immediately I added that this should not happen in Canner.

Third: I was talking about the principles of weight system and manufacturing tolerances in general. I did not talk about the specifics as how EXACTLY they are machined. It is up to the manufacturer. And there could be variations from one to the next.

Fourth: Your statement saying " Vent pipe diameters aren't relevant unless they are plugged..."""
is absolutely incorrect. The combination of the hole diameter and the amount of weight determines the amount of pressure held inside the cooker/canner. So if the hole diameter also has a tolerance as well. And any deviation from the nominal can make a difference.
Clogging is another thing that also affects the effective diameter of the vent hole.
...................................................................... .........
foot note:
P S I = pound per Square Inch. IN THIS CASE
"P " is the weigh sitting on the hole.
"SI = Square Inch." is the cross section area of the vent hole

psi = 10.5 = P/A , assume A= 0.0 2 then 10.5= P/0.2 ; P= 0.21 lbs = 3.36 ozw


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RE: Pressure canning help ASAP - weights, but pressure climbing?

They look just fine. Yes, sometimes too much unneeded info.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

Sorry. I missed the point about raw-pack meat. Dave is correct that raw pack generally does look like your jars. But both of us agree that the meat is just fine.

While the weight is on there to regulate, that doesn't mean that the pressure can't build up over time to a higher point. You'll see/hear the weight jiggling more and more madly and it will sound louder.

The ideal is not to get to that point, so despite the weight, which does give you some latitude, you do still have to manage the heat settings. With an electric range it can be more problematic as it takes longer for the heat to come up and go down.

This is all part of learning and managing your range to optimize the canning process. You're doing fine.

And if I had to choose, it's better to ask lots of questions and perhaps over-react than to have this cavalier "Oh, everything's just fine" attitude.

Enjoy the meat and give yourself a pat on the back.

Carol


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RE: Pressure canning help ASAP - weights, but pressure climbing?

You will love the idea of coming home and NOT having to brown/cook that meat. It saves SO much time. I like doing up several jars of ground meat (that's what I use in chili), I dump the jar into a pan and add the extras.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

OK, Carol, 1 more question (and yes I am a nervous Nellie): I took the jar with the least amount of liquid and jiggled it, trying to get the meat that was piled in a sort of "tower" all stuck together to come down under the liquid. Succeeded, but also turned it to see how much it moved, some of the pieces in the interior look rare - is this normal/safe? Should I stick that jar in the fridge to use ASAP since the seal might be compromised from handling?

Should I open all the jars to see if the meat is rare/raw in the middle? I do have some room in the freezer, I'm willing to chalk this one up to learning experience and do hot pack in the future.

seysonn - yes, I understand all that but it's really not helpful information - Carol and Dave have already said the rise in pressure is due to rise in heat (Ideal Gas Law works both ways) and I should have turned the burner down. The weights aren't machined to as tight a tolerance as I would have expected since it looks like my gauge is pretty accurate (I also made sure the weight was rocking steadily before setting the timer, didn't just go by the gauge), since it did let it go a pound or so over what it was machined to (assuming the gauge was spot on). But I don't have to worry that I underprocessed or overprocessed the meat, and I don't think that I underprocessed the tomato sauce when the weight was jiggling steadily and the gauge was between 10.5-11.

This post was edited by ajsmama on Thu, Oct 17, 13 at 17:07


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RE: Pressure canning help ASAP - weights, but pressure climbing?

  • Posted by digdirt 6b-7a North AR (My Page) on
    Thu, Oct 17, 13 at 17:16

First of all I am not the on who is spreading scare stories here. and rules every thing to be tossed.

Neither do I. But then I don't accept the "do whatever you want, everything's fine" attitude either and I, for one, will take issue with it every time.

Second: I said foaming occurs in pressure cooker(when cooking meats ..). But then immediately I added that this should not happen in Canner.

So since this post isn't about cooking meats and there is no concerns with foaming it isn't relevant to the issue. Why post it? How does that help? When someone is trying to learn pressure canning and already worried the last thing they need is someone dragging their focus off on an unrelated tangent.

Third: I was talking about the principles of weight system and manufacturing tolerances in general. I did not talk about the specifics as how EXACTLY they are machined. It is up to the manufacturer. And there could be variations from one to the next. Vent pipe diameters aren't relevant unless they are plugged...""" is absolutely incorrect. The combination of the hole diameter and the amount of weight determines the amount of pressure held inside the cooker/canner. So if the hole diameter also has a tolerance as well. And any deviation from the nominal can make a difference.

Yes that's all well and good info for the mechanical engineer that designs the equipment and oversees its manufacturer. It has no relevance to the person using the canner at home. Milling to tolerances isn't our problem. We aren't going to dig out our calipers and mic the ID and OD of the steam vent and adjust it accordingly. So the info is of no practical use to us and only confuses the issues under discussion.

Dave


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RE: Pressure canning help ASAP - weights, but pressure climbing?

Sheila, you will get this, and I know you are a 'nervous Nellie'. Maybe not, but you do 'over-think' alot. But that makes you more careful, and that's a good thing.

There is never a stupid question, but plenty of stupid answers.

Before you know it, you'll be PCing everything in sight.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

I'm sorry I brought up the question of the weights being off, I was just trying to figure out how high the pressure could be expected to go and what to do about it.

I don't think I'll be PCing everything in sight, glad I didn't start this last night since even with the meat already cut it took about 4 hours to do a 75-minute processing and I would have been up past midnight. Easier to just buy some Chunky Soup for when the power goes out.

Still have the question about the rare-looking meat.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

Yes, it can look rare in the middle, so as long as you've followed the appropriate instructions for pressure and time you needn't be concerned. Actually, that's not necessarily "rare-ness" but color changes which accompany the process. When I can venison it's largely pink in color but more than sufficiently cooked.

In time all this will become second-nature to you and it will seem less of a big deal. Those of us who are older and grew up around canning and pressure processing had a much easier time of it because we had our mentors showing us what to do all along the way. Learning it on your own is more challenging.

Carol


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RE: Pressure canning help ASAP - weights, but pressure climbing?

Thanks Carol - I don't think my grandmother ever canned (at least not in my lifetime, maybe earlier). My godmother did (at least jams and jellies we found in her basement) but again never around me. My mother never learned and has no interest in it (she rarely even cooks from the garden and doesn't try to freeze or preserve excess though there are times we could have used it). In fact, she was worried about me using a PC, even when I told her I was buying a new one and not using the antique AA. So I'm learning everything online (here, NCHFP and now watching Ball demos).

I'm glad my meat is cooked enough - I will put that 1 jar in the fridge to use ASAP since I manhandled it, but I feel secure now putting the others in the basement with the rest of the canned goods.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

Now comes the time to figure out how many ways you can use it. Even just out of the jars as a cut up roast works, but then you have 4 instead of the 2 of us.

I'm old enough to be your mother, and most of my generation never learned. My home ec teacher decided after she was diagnosed with cancer that she needed to pass on her canning knowledge. I was the only one in the class to know anything about it. My MIL didn't do any canning, or much cooking even. I taught my sons, after all I needed as much help as possible since I canned more each year than I have this year. My DILs have no clue, but the grandchildren are learning.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

Marla, you're in your 50's, aren't you? You're not old enough to be my mother ;-)

But we didn't have home ec - I went to 7th grade to a regional jr/sr high that I think offered it, only 1 semester before we moved to a very small town that had K-8 in 1 building and no kitchen/cafeteria. Then went to high school at a semi-private school where I was on the college track. I took 3 years of Latin, and all but 1 of my senior year courses were university freshman courses (I had to fulfill the American History requirement otherwise I would have graduated in 3 years). But no Home Ec. So not only did I have to learn to cook (so-so) on my own, and learning canning here, but I kind of taught myself to sew and I'm taking a beginning sewing course starting Monday night so I can learn how to use a pattern and make alterations instead of just trying to cut something close to a garment that fits and then keep doing fittings from there (on DD, I haven't successfully altered or made anything for myself yet).

I'm trying to get approved to lead her GS troop and maybe we'll do some sewing, I need to take special safety training to be able to teach them to cook (!), and to go camping. Not sure about electrical wiring (but they're young yet). But in addition to cooking (I don't think there's a Laundry badge LOL) I hope to teach them some basic life skills. DS did learn to follow a recipe in Jr High but I'm still trying to get him to master a bleach load. I have to write all the steps out and laminate it for him - he only has 3 years before he leaves for college.


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RE: Pressure canning help ASAP - weights, but pressure climbing?

Yes, late 50s. I'll email you as far as the sewing and GS stuff.


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