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What causes food/liquid to leak out of jars after and/or during heat processing?

April 26, 2017causes food heat jars leak liquid

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What causes food/liquid to leak out of jars after and/or during heat processing?

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Loss of liquid from a jar of food is called “siphoning”. It can be caused by: • too little headspace • failure to keep jars upright at all times • removal of jars from processing a boiling water canner too quickly (before boil has subsided) • too little water above the jars during boiling water processing • fluctuating pressure in a pressure canner.