Are glass jars for canning made from special types of glass?



  1. 0 Votes

    Glass canning jars for the home need have thicker glass and be heat tempered; commercial glass jars of food you buy at the grocery store are typically made of too thin glass or are not heat tempered to withstand the high pressure of canning and should not be recycled for canning purposes. Typical home canning glass jars include mason jars and clamped glass-lid jars.

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