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re : problem with glaze???

updated thu 5 oct 00

 

iandol on tue 3 oct 00


Dear Kathleen,

I would need to know more about your firing schedule, in particular I =
would like to have a look at the cooling curve.

Without more information and getting the calculator out I would suspect =
that you have incipient devitrification and that some of the =
wollastonite is crystallising. If this is the case, you will need to =
increase the rate of cooling down to about 750 deg Celsius then hold for =
a while before doing the slow cool through the Quartz time barriers.

Hope that throws some light on the problem for you.

All the best,

Ivor Lewis. South Australia=20