Quote Originally Posted by daihashi
The breaking of the jar has nothing to do with temps.
aren't the temps responsible for the difference in pressure?

is your new hobby mycology? that's a pretty interesting hobby.

if so, isn't gas exchange necessary in mycology? won't stale air cause your cake to be slow colonizing or not to colonize at all? the tyvek is just used to keep the moisture out of your cakes while your pressure cook them. so the moisture content of the cake isn't messed with. (it's been a while since i read up on this stuff!)

-shake