There was a canning lid shortage about the mid 1970s. My mother told me that her sister, a country woman, was reusing lids. I have no idea if that worked or not. I don't know the reason, but there was also a gas shortage in the 70s decade. I always buy some lids late summer for the next year.
You must
never reuse lids! That is a sure way to get deadly botulism in your canned goods. Because the lid has already been cracked to open the jar the first time, it can never be resealed to completely shut out air, even if it
looks pristine.
There was a canning lid shortage in the 70's because there were so many of us who grew up in the sixties going back to the land, growing and preserving our own food, doing then what everyone in this thread is doing now. Perhaps for different reasons, but many the same. Our planet is small and fragile - the Vietnam War contributed to this insight. The movement coincided with the inauguration of Earth Day and our realization that because we were dependent on foreign oil (thus the gas shortage brought on by political manipulations), our livelihoods were vulnerable. In New Jersey for a wedding, my DH and I waited in line at a gas station for an hour and a half (engines off, of course) for a rationed five gallons of gas. It took us a long time to get back to New England.
We are still dependent on foreign oil. Imagine how much progress we could have made if people had put on their sweaters, turned down their thermostats and continued research on alternative energies (sun, solar, geothermal, etc.). Now we are doing what we should have done forty years ago, and many in congress are still fighting conservation.
I don't get it.