Alisa Clausen on tue 24 jun 03
Glaze test for Burke's Celedon, cone 5-6, ox.
Glaze tested on white midrange stoneware fired in electric oxidation to =
1220c.
Source:
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)
5 min. soak
cool down max. to 800c
Hold 1 hour
Shut off kiln
Recipe:
58 Custerspar
17 Whiting
14 Flint
6 OM4 Ball Clay
5 Zinc Oxide
ADD
0.25 Copper Carb.
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 precent =
to the 100 gram test batch.
Substitutions:
Feldshammer for Custerspar
Results:
Gloss glaze that has a clear shell over pale turquoise ground. The =
overall glaze has a pale aqua color. Stayed where it was dipped.=20
Deeper aqua where thickest.
Deep Turquoise
Same base
ADD
1.0 Copper Carb.
resulted in a deep turquoise green gloss glaze. Mottling and fuzzing =
with both richer and lighter tones. Deeper color where thickest.
Regards from Alisa in Denmark
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