The lids are put on before they're processed.

zxcvbob wrote:
Mike Stith wrote:

How do you think non-acidic foods such as meats and fish are
"canned"?? They're loaded into giant pressure cookers for processing.


Yes, but when do they crimp on the lids? I have some old canning books
that deal with using metal cans. I'll look it up tonight, but I think
the lids are crimped after they come out of the autoclave.

Bob