Sometimes I get calls at the office about people having trouble getting their home canning jars to seal. Below are reminders of things to check when you are working with canning lids. Watch how tight you put on the screwbands and also watch your headspace, the amount of air left at the top of the jar.
The information below came from Mississippi State University Extension Service. These are common home canning questions and answers on why jars don’t seal.
Q. How tightly should screwbands be put on when closing jars with two-piece lids?
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