[Sca-cooks] OOP canning adventures
Stefan li Rous
StefanliRous at austin.rr.com
Wed Oct 15 00:22:34 PDT 2008
Alex asked about canning jars cracking or imploding:
<<< Really? We re-used jars for years, and pressured canned all the time
without any such breakage. Wouldn't the flaws show up the first time
they go under pressure? >>>
Not necessarily. If the problem is a weakness induced during
manufacture or initial shipping, then yes, most likely. However it is
possible for something like a jar to survive the first canning and
not crack till later. I think though that the problems that might
appear later are more likely to be due to stress caused by uneven
heating or a scratch or something happening during its use.
I'd say go ahead and use any jars that don't show a definite injury.
In a pressure cooker/canner any fragments are likely to be contained
and since the jars are going to implode, not explode they are
unlikely to cause a chain reaction of exploding jars, unlike what can
sometimes happen in brewing. I think the biggest problem would be the
waste of the contents that were in that jar and some cleanup to do.
Once a jar has cracked or imploded, I wouldn't take the risk that you
got all glass slivers out.
Stefan
--------
THLord Stefan li Rous Barony of Bryn Gwlad Kingdom of Ansteorra
Mark S. Harris Austin, Texas
StefanliRous at austin.rr.com
**** See Stefan's Florilegium files at: http://www.florilegium.org ****
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