Internal cracks

#13341
Stephen Richard
Participant

are most commonly caused by the incorporation of incompatible glass. It can be caused by inappropriate firing schedules. You don’t tell us what the actual schedule was (each manufacturer has different ones). In any case, if you have a problem with a schedule, you normally need a different one for the next firing.

Stephen Richard

blogs at: http://www.verrier-glass.blogspot.com/ and  http://www.glasstips.blogspot.com/

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