Frequently Asked Questions
Search Knowlege Base
Canning -- Miscellaneous
Should I retighten lids on canning jars after processing?
No. Do not retighten loose screw bands after the jars are removed from the canner. You will disturb the seal that began forming when the jar started cooling.
This causes "cut throat," a condition where the jar rim cuts completely through the
sealing compound to the enamel lid resulting in seal failure.