What is the recipe for preserving olives by heat, and how long do they
have to remain in the heated state?
Canning olives is a process, not a recipe, and it has to be operated
with judgment. It resembles, of course, the common process of canning
other fruits and vegetables. It has been demonstrated that heating up to
175° Fahrenheit is effective to keep olives in sealed containers for
over two years. The heating was done in the jars in the usual canning
way for several minutes after 175° was reached, to be sure the contents
were heated through.
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