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Canning -- Miscellaneous
Why is open kettle canning not recommended?
In open kettle canning, food is cooked in an ordinary kettle, then packed into hot jars and sealed without processing. The temperatures obtained in open kettle canning are not high enough to destroy all spoilage and food poisoning organisms that may be in the food. Also, microorganisms can enter the food when it is transferred from the kettle to jar and cause spoilage. Source: Original FAQ posted at http://126.96.36.199/faq/FAQ_home.php