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Boiling water bath canning is safe for preserving high-acid foods. High-acid foods have a pH of 4.6 or less. High-acid foods naturally prevent C. botulinum spore growth.
Unsafe Canning methods include open kettles, conventional or microwave ovens, steam canners, dishwashers, canning powders, or jars with wire bails and glass caps.
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July 7, 2017