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Re: [teacherartexchange] Salt Glaze Pottery


From: M. Austin (whest177_at_TeacherArtExchange)
Date: Sat Jul 28 2007 - 11:36:46 PDT

Marvin, I knew I could count on you! We recently visited Williamsburg VA
where everywhere we went there were salt glazed pottery for sale. There is
the Williamsburg Pottery nearby that creates all the pottery for sale, and I
didn't realize it would entail new methods or I would have urged hubby to
take me. I purchased a small bowl that is gorgeous, but I couldn't find the
techniques for creating. I don't know if there are any nearby courses for
salt glazing, but I will have to look into it, if nothing more than for my
own personal curiosity!

> In salt glazing the glaze is formed in the kiln by putting salt into a
> kiln that is around cone 10 (2350 F). The salt vaporizes and the soda
> from the salt helps the silica of the pottery to melt and form glaze. The
> chlorine vapor (gas) from the salt is a toxic air pollutant and would
> harmful to breath. Salt vapor ruins electric heating elements and
> insulation brick used to make electric kilns is quickly ruined. It is
> also very hard on other firebrick and kilns shelves require a huge amount
> of cleaning between firings. To avoid the chlorine gas, some potters have
> switched to using pure soda vapor glazing. The results are a bit
> different.

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