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Registered: 03/30/02
Posts: 78
Last seen: 20 years, 7 months
A Pressure cooker question....
    #1290552 - 02/08/03 07:11 AM (21 years, 22 days ago)

I got a pressure cooker from a friend and it has a special weight thing that only allows it to pressure cook at 10 psi. would this be enough to get the jars sterile? Or do I need to buy one that will do 15 psi? Let me know what you all think.


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Myconerd - DBK
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Registered: 12/09/02
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Re: A Pressure cooker question.... [Re: confusedteen420]
    #1290751 - 02/08/03 09:11 AM (21 years, 22 days ago)

yes, it will work, just have to cook longer.
from TMC:
"Note the effect achieved from sterilizing at 60 minutes at 15psi is the same as that from 30 minutes at 30psi. Hence a doubling of pressure reduces sterilization time by one half....."

Chart from TMC:
Relationship of pressure and temperature at constant volume:
10psi = 240F
15psi = 250F.

With that information you can do the math....

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Registered: 03/30/02
Posts: 78
Last seen: 20 years, 7 months
Re: A Pressure cooker question.... [Re: debianlinux]
    #1290853 - 02/08/03 10:05 AM (21 years, 22 days ago)

So since 10 psi is 2/3 of 15 psi I should pressure cook them an extra third of an hour so 80 minutes should do it. I hope so. Thanks alot, I'll just PC them 90 min. or so to be sure. Thanks again.


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