[Clayart] pot shattering during bisque

MGordon clayart at earthlink.net
Mon Jul 18 14:04:51 EDT 2016

An unknown trapped air bubble might not cause the whole pot to shatter 
just pop a chunk out of the wall. More likely too much moisture in the 
pot. I always put my kiln on pilot over night but it's gas, & I thought 
you said you are firing in an electric kiln. In that case I always hold 
a mirror up to the top peep hole & if any moisture fogs the mirror I 
let it go another hour & check it again before turning the kiln up. 
Mike Gordon

  PS didn't you say you are using porcelain? A lot tighter clay body 
than brick clay.

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