Lids on Canned Tomatoes Turned Black

The canned tomatoes that were all done at the same time, but my daughter has stored hers in a warmer environment than I have. When she opened a jar tonight the canning lid was all black. The tomatoes taste OK, but I'm afraid that there could be a problem with them. She says she can see other lids (through the jar) that also have black on the inside lid.
Should I tell her to toss the whole works? The fruit that is stored in the same place seems to be OK.
Thanks for any help.

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By BevM

July 22, 20110 found this helpful

I remember an old saying; When in doubt. Throw it out!

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July 22, 20110 found this helpful

I don't know if they would be any good or not. Did you can them together or did she do hers at her home? I do know that I was brought up that home canned goods should be stored in a cool place like an unfinished basement, you don't want it to be cold enough that the stuff will freeze, but cool.

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July 22, 20110 found this helpful

Throw away like Keeper said when in doubt. There could be so many reasons why this happened that I wouldn't take the chance of someone becoming ill because of using.

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July 25, 20110 found this helpful

Toss

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July 25, 20110 found this helpful

I use to do a lot of canning. Sometime I would get some jars with black on the lids. If I remember right it was mostly tomatoes or peppers. Things with high acid. Can not remember if they had been canned for a while or not, but I always toss them out. You can not tell if they will make you sick or even kill you by tasting. As Keeper said When in doubt. Throw it out.

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