Alisa and Claus Clausen on fri 6 oct 00
Source: Ceramics Monthly, May 2000
Tested on white, roughly grogged, medium range stoneware, fired to =
1220c.
Receipe
30 Gerstely Borate =20
10 Whiting =20
35 Custer Feldspar =20
15 P.V. Clay Plastic Vitrox =20
10 Flint =20
ADD
2% Red Iron Oxide =20
3% Rutile =20
Substitutions used
Colemanite for G.B.
Forshammer feldspar for Custer
Cornwall stone for P.V. Clay =20
This was the darling of these test trials.
Results were a golden brown, glossy, glaze. It pooled a lot in the =
center of the test bowl, but did not drip on the outside.
The pool is creamy, shiny opaque, with.......large floating crystals and =
an opalescent ring around the pool. Very nice.
Inbetween the blue ring and the pool, is a second ring of whiter, very =
small crystals. =20
Let's get that again..
I have to try this on a smooth clay. Maybe the roughness of this test =
bowl added to the nice qualities of this test, as the
browner colors hung up on the grogged wall, and then pooled in the =
center, giving a giant variance in texture and color. =20
On a smoother clay, the entire surface may move more and streak overall.
Tried this Colemanite Cream Gloss over the Colemanite Plum, and the =
results were a more or less golden brown, stable, but
splotchy according to application thin/thick. Not exciting compared to =
the same combination of the G.B. versions.
Note: Ron Roy's version worked so well, this was more or less for my =
own curiosity.
Best regards,
Alisa in Denmark
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