Paul on tue 8 oct 02
Hello,The following glaze, fired to cone 11, seems to be the cause of some
rim cracks along the inside of pots. I pour this glaze on the inside and
spray two different glazes along the outside rim and the bottom of the pot.
I have had to unload the kiln "with gloves" lately due to time constraints
but this has not cracked any other of the pots in the same way. so is it
possible that a certain type of glaze would cause cracks like this? The
recipe is as follows:
Dolomite 12.00
Strontium 6.00
Whiting 8.00.
Neph Sy 37.00
EPK 2.00
Flint 40.00
Copper carb 2.00
Rutile 5.00
I am under the impression that this glaze has a high level of expansion,
which could be part of the problem, but i do not know exactly how much. Does
anyone have any suggestions as to how i could recalculate this glaze so as
to reduce the expansion?
Thanks,
Paul
Falmouth KY
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