On 2018-07-11 5:00 PM, songbird wrote:
> Terry Coombs wrote:
> ...
>> Â* We're following the same procedure we always use , and never had a
>> problem . This is the first time using these jars though we've had them
>> for years . I'm wondering if they've been scratched or chipped maybe . I
>> didn't inspect the jars myself so I don't know . They are Kerr branded ,
>> don't know for sure where we got them or when but they've been around
>> for years unused .
>
> bad batches of products do happen...
>
>

That's true, but when canning with jars the temperature changes are the
most likely cause of glass breaking.