Alisa Liskin Clausen on sun 8 sep 02
Touchtone Red, cone 6, ox. plus other colorants to base.
Glaze tested on white midrange stoneware fired in electric oxidation to =
1220c.
Source: Clayart
Credited to:
Firing ramp:
100c p/h to 600c (212f - 1112f)
150c p/h to 1100c (330f - 2012f)=20
100c p/h to 1220c (212f - 2228f)
cool down max. per hour to 1100c=20
cool 80c per hour to 800c
shut off kiln
Recipe:
32 Gerstley Borate
30 Flint
20 G200
15 Talc
5 EPK
ADD
15 RIO
Note: All raw materials are measured up or down to the nearest whole =
decimal. =20
Colorants or additives to a 100 gram test batch are measured in percent =
to the 100 gram test batch.
Substitutions:
Borax frit for Gerstely Borate
Results:
15 RIO
Gloss glaze with many color nuances. Rust brown base with streaking in =
darker browns and slightly green browns. Edges have a bluer nuance. =
Some areas under surface are honey brown. Where very thick, the glaze =
ran in large drips. Moved and pooled where very thick, but otherwise =
stayed where dipped.
5 RIO
Semi matte glaze that is yellowier where thicker, browner where thinner. =
Many nuances, did not move.
10 Ocher
Overall yellowish glaze where thicker, shiny. Where thinner, browner =
and matter. Where very thick, it crazed.
3 Cobalt Carb.
Lavender semi matte glaze where thickest, bluer where thinner.
3 Cobalt Carb. + 5 Rutile
Medium green semi gloss base with bright, cornflower blue crystals where =
thicker. =20
Lovely contrasts.
3 Cobalt Carb. + 5 Rutile + 5 RIO
Similar to above, but some movement where the edges of glaze are dark =
blue. Glaze is more fluid, instead of distinct crystals like above,
the lighter blue is in streaks. =20
Regards from Alisa in Denmark
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