How Much Alum for Crisper Pickles

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Q: Hi Dave,

I wonder if you could tell me the ratio of alum used to make pickles crisper when pickled. The alum I have purchased has no instructions as to how much to use.

Thank you,

Mel

A: Hello Mel:

One source I found says, "use no more than 1/4 tsp alum per 1.2 litres (quart) of pickling solution."

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