the jar, sucking the dome downward (concave) - an indication that a seal is good. Processed jars should be stored in a manner where the lids are not disturbed and the seals remain intact.

The metal screw bands are used to properly align the lids onto the jar, and to hold the lid in place during processing. They should be removed after processing and may be reused many times as long as they are kept rust-free and undented.

Collecting vintage jars

The value of a jar is related to its age, rarity, color, and condition. A

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