Linda Arbuckle on sun 1 nov 98
Diane,
Charles McKee wrote "Ceramics Handbook; a Guid to Glaze Calculation,
Materials, and Processes",, pb. by Star Publishing Co, Belmont, CA
He says commercial opacifiers are usuall fritted zirconium and silica
and distinguishes them:
Opax: best at lower temps.
Ultrox: effective at all temps, 6% = white, stronger than Zircopax
Zircopax: effective at all temps., 5-1-% required for white.
--
Linda Arbuckle
Graduate Coordinator, Assoc. Prof.
Univ of FL
School of Art and Art History
P.O. Box 115801, Gainesville, FL 32611-5801
(352) 392-0201 x 219
e-mail: arbuck@ufl.edu
Marley Wolhud on tue 3 nov 98
Linda, thanks for your response. My local ceramic supply co. does not
carry ultrox. Since the frit that I have looks like powder and the
zironium silicate looks like powder, I didn't know how Fritted Z.S.
looked any different from regular z.s.
Based on your response, it seems I need to add more zircopax to get the
desired effect. This is probably another stupid question but if I add
say another gram (if a test glaze was 100 g) do I need to adjust all the
other ingredients downward to come up to 100%? It seems that most of
the glaze recipes in Clavell's book use Ultrox. Or is the answer to
find someone who carries it?
I keep thinking I have all the right reference materials and yet, it
seems I need to get this Glaze Calculation book.
Thanks
Diane
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