Alisa Clausen on thu 22 apr 04
Glaze test for Val Cushing cone 5/6 Alkaline Mat, oxidation.
Glaze tested on white midrange stoneware fired in electric oxidation to =
1220c.
Source: Ababi
Credited to: Val Cushing
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
30 Neph. Syenite
25 Frit 3110 Subbed Boron Frit J
10 Whiting
10 EPK
10 Silica
Colorants or additives to a 100 gram test batch are measured in percent =
to the 100 gram test batch.
Results: =20
Base
Glossy transparent base which crazed badly. Oxides became very fluid =
under glaze
1.0 Copper Carb.
Glossy transparent light green glaze, crazed and oxides became extremely =
fluid and runny under glaze.'
5.0 RIO
Glossy transparent light yellow glaze, crazed.
1.0 Manganese Diox.
Glossy transparent glaze, slightly purple. Crazed.
Regards from Alisa in Denmark
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