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Offlinesuzie_girl
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Alternative to PCing
    #552527 - 02/15/02 02:19 PM (19 years, 11 months ago)

The PF method tells you to put the lids on backwards, and not to screw them on tight. What if you put the lids on as designed and screwed them down tight. When you boil, wouldn't the pressure inside the jars increase like a pressure cooker? It would seem that would increase pressure and temp inside the jars. I know, "just spend $50 at Wally World and buy one."


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OfflineAnnoA
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Re: Alternative to PCing [Re: suzie_girl]
    #552535 - 02/15/02 02:23 PM (19 years, 11 months ago)

No, becasue the temperature in the open pot doesn?t go above 121?F.

And besides that you have holes in the lids, so it doesn?t really matter if the lids are screwed tight or not.


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OfflineSeussA
Error: divide byzero

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Re: Alternative to PCing [Re: suzie_girl]
    #552615 - 02/15/02 03:21 PM (19 years, 11 months ago)

Yes, the pressure inside the jars will increase just like a pressure cooker. Unlike a pressure cooker, the jars are made of glass, which will quickly succomb to the stress this pressure creates and explode in a shower of fragments. If you decide to test this, be sure you are nowhere near when they explode.

It would be better and safer to triple boil, loosely closed (pf-style), with 24 hours between each boiling.

[edit: my post assumes that you are sealing the jars, no holes in the lid, etc. Anno's post assumes the opposite (I think) hence the different answers]


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Just another spore in the wind.


Edited by Seuss (02/15/02 03:24 PM)


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InvisibleMushroom_Madness
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Registered: 01/10/02
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Re: Alternative to PCing [Re: suzie_girl]
    #553768 - 02/16/02 07:22 PM (19 years, 11 months ago)

Hey Suzie_Girl, Take a trip to the vendor forum and enter to win a pressure cooker! You've got nothing to loose!


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InvisibleTCatz
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Registered: 11/09/01
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Re: Alternative to PCing [Re: suzie_girl]
    #554022 - 02/17/02 12:46 AM (19 years, 11 months ago)

just buy one ........you'll be happy you did.....


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OfflineKoOs
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Re: Alternative to PCing [Re: TCatz]
    #554032 - 02/17/02 01:01 AM (19 years, 11 months ago)

You can use a Steamer.

I used one worked out fine.


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OfflineAnnoA
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Re: Alternative to PCing [Re: Seuss]
    #554110 - 02/17/02 02:56 AM (19 years, 11 months ago)

>[edit: my post assumes that you are sealing the jars, no
>holes in the lid, etc. Anno's post assumes the opposite (I
>think) hence the different answers]

Look. You?re sealing the jars, ok. But you?re not sealing the pot, and the water that is in the pot will only heat up to 212?F. OK? So why would the jars heat up over 212?F and build up a pressure?

The only pressure that will build up in the jar is from the air that is in the jar and which volume expands when heated in a closed space, so expect a pressure rise of
p2 = (p1 x T2/T1) -p1 = (15psi x 373K/293K) -15psi = 4.1psi but NO temperature rise.


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Offlinerewny
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Registered: 02/19/02
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Re: Alternative to PCing [Re: Anno]
    #555999 - 02/19/02 07:13 AM (19 years, 11 months ago)

<>

That's not accounting for the volume of the water evaporating is it? That would increase the pressure, and thus the heat (before it explodes).


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OfflineAnnoA
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Re: Alternative to PCing [Re: rewny]
    #556009 - 02/19/02 07:45 AM (19 years, 11 months ago)

There is no water evaporating in the jar. There would be if the sealed jar would be in a environment hotter than the boiling point of water. But it?s not. It?s in the pot where there is water at the bottom and which boils at the boiling temperature of water, not above.
Comprende?


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