Bonnie Staffel on sat 22 dec 01
SNIP
"My reasoning for not waiting until it's cool, if I can take a glazed
casserole out of my oven at 400 degrees without it affecting the glaze,
exposing my pots of the same temperature to the air should not effect
the glaze on them either. Seems like any problems they have would
already be established by the time they get to 400 degrees."
What you are missing here is that the casserole contains food that tempers
the cooling to a much slower degree than an empty pot. You are also
stressing your kiln that has expanded during the firing and should also be
given the opportunity to shrink down to its cool temperature before shocking
it. Even when the pots are taken out at about 150 degrees, they should be
turned upside down to contain the remaining heat until hand touchable. "do
as I say, not as I do" HEHEHE
Regards, Bonnie Staffel, Charlevoix, MI where there is a little snow to give
us a white Christmas.
Dave Eickholt on sat 22 dec 01
Different clay bodies and glazes do different things on cooling too fast, my
liner glaze will not craze at 250 degrees when pulled from the kiln but the
crystalline will craze like crazy so I have to wait till 100 or less degrees
Dave
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