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crystaline glazes

updated fri 24 aug 01


Jennifer Rhinesmith on mon 28 jul 97

Hey It's me again, just wondering if there is a good book out there about
crystaline glazes? I just saw the ones in Ceramics Monthly and they are
wonderful. Thanks, Jennifer in Alpine

Sherry mcDonald Stewart on wed 30 jul 97

You know, I have a friend on the other coast who has done some work with
such glazes, she is not online, however, so i don't know how long a
reply might take. You asked the line yet? I am sure there is a lot of
stuff on chrystalline glazes available. Good luck. Sherry

William W. Batstone on mon 19 apr 99

I just purchased an Orton AutoFire controller for my electric kiln, in large
part so that I could control cooling ramps and experiment with crystaline
glazes. I usually fire to ^6 and use mid-range porcelain and white
stoneware. Does anyone have any good recipes for me to begin with? Thanks.

Joshua Lynch on tue 20 apr 99

In Cooper's electric kiln ceramics he has a crystaline glaze for 2300F. It
seems to work at ^6. I've only tested one small test tile though.

Good luck!

Josh in NC, where the leaves are out and the dogwoods are blooming.

Fabienne Micheline Cassman on sun 7 jan 01

For those of you who are interested in sharing crystalline information and
experiences, there is a monthly available, ISCA (International Symposium of
Crystalline Artists.) It's available through Don Holloway at

I have more information on my site about crystalline publications,
articles, etc.

Milky Way Ceramics

Yes, I have learned from my mistakes...
I can reproduce them exactly.

iandol on wed 22 aug 01

Dear Scott B. Ackerman,

Zinc silicate has to form from the mixture. To get this to happen all of =
the ingredients have to go into solution. It is important to ensure that =
all of the zinc oxide dissolves before the Willemite starts to =
precipitate. You rely on the glass in the frit to keep everything in =
solution as the melt cools. Crystals seem to grow best just above the =
glass transition temperature.

However, even though many kilns cool quite quickly when they are shut =
down, cooling may not be fast enough to suppress the rapid formation of =
crystallites of Zinc silicate, which might lead to an overall even =
distribution of very small crystals, even a matt surface. So crashing by =
200 0r so degrees helps to suppers nucleation and so you get fewer, =
larger crystal masses.

Others may have a different answer.

Best regards,=20

Ivor Lewis,