jeff seefeldt on mon 1 oct 01
First of all, just wanted to thank you for all the information available at
your website.
Second, we talk about firing schedules alot, but rarely cooling schedules.
What do you suggest?
jeff
----Original Message Follows----
From: John Hesselberth
Xavier's Warm Jade Green, which someone mentioned earlier, is a good stable
satin glaze which could be used as a base. It does require slow cooling,
though, to give a satin finish. I think I can predict that all properly
formulated satin or matte glazes require slow cooling to get that surface.
That surface results from recrystallization of some of the glaze components
and that takes time to happen.
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John Hesselberth on mon 1 oct 01
on 10/1/01 8:42 AM, jeff seefeldt at jeffseefeldt@HOTMAIL.COM wrote:
> Second, we talk about firing schedules alot, but rarely cooling schedules.
> What do you suggest?
Hi Jeff,
I drop fairly quickly from 2200F (cone 6) down to about 1900F, then cool at
150F/hr down to 1500F. I've check variations around this and this works
well for me. If you apply glazes more thickly, you might want to slow down
a bit from this schedule. And remember, this is most important for mattes
or semimattes. Of course the cooling schedule is critical for macro
crystalline glazes--you normally soak those at a lower temperature for a
couple hours or more. Glossy glazes can normally be cooled by just turning
the kiln off.
Regards,
John
Web site: http://www.frogpondpottery.com Email: john@frogpondpottery.com
"The life so short, the craft so long to learn." Chaucer's translation of
Hippocrates, 5th cent. B.C.
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