[Clayart] pot shattering during bisque

Ken Chase kchase235 at gmail.com
Mon Jul 18 15:14:32 EDT 2016

Thanks Mike:
Except for one time using a custom setting for
A slow cool for crystalline glazes I've always chosen a program set by the manufacturer of the electric kiln. I don't think I can make any changes once the program starts so I don't know how I could employ your technique of using a mirror to judge moisture. 
Maybe I should figure out how to customize 
All my firings. 

Sent from my iPad

> On Jul 18, 2016, at 11:04 AM, MGordon <clayart at earthlink.net> wrote:
> 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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