I found this on the internet. I hope it helps! Happy canning!
In order to prevent your new rings from rusting make sure you remove them from the jars 24 hours after they are processed and you are sure the jars are sealed, once the jar is sealed the ring is not needed to maintain the seal. Then you should wash your jars off before storing them and also wash the rings. I like to set the rings in a warm oven (like 200 degrees) for a few minutes just to make sure they are totally dry before storing them. I have over 500 rings on hand that have been given to me over the years but I really only ever use 50 of each size and if they do get rusty I throw them out, Why take the chance of they not sealing the lid properly and having to reprocess your jars, and sometimes rusty lids are hard to get off after processing.
WARM OVEN after washing. And then immediately into heavy (freezer weight) ziplock bags. I then put the bags in "latchable" rubbermaid containers, as our basement can be slightly damp at times.
To "oven dry" them, pat them dry with a towel, and then stack them right side up on a broiler pan or cookie sheet... you can usually stack 2-3 layers with a little care. Put them in a 250° oven for 20-30 minutes. Let cool enough to handle and put them in the sealed bags.
I've got rings I've used for 30 years (the older ones are noticeably heavier and sturdier than the new ones) and they are in good shape.
We remove them after the jars cool so they do not rust themselves in place on the jar making hard to remove later, we also have so many of them I could not even guess how many we have. You could lay them out on some cardboard and spray paint them, then once they dry turn them over and do the other side.
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