I canned about 50 litres of tomato sauce made from black or black/purple tomatoes in the last 2 years. I recently used a jar from 2 years ago that was made from black and purple tomatoes and it was delicious...no problems...and smelled great straight out of the jar (no onions or garlic yet added - which only could be called a bonus addition afterwards). I've used Carbon, Black Krim, Black from Tula and Purple Cherokee in the past. I'll be expanded upon that list this year and in the future.
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