Alisa Clausen on thu 26 feb 04
Glaze test for Graces "B" Base, cone 6 ox.
Glaze tested on white midrange stoneware fired in electric oxidation to =
1220c.
Source: ClayTimes, Sep/Oct.
Credited to: Grace Lewis
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:
20 Frit 3134
20 Dolomite
20 Kona F-4 Soda Spar
20 OM4 Ball Clay
20 Silica
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:
Frit J for Frit 3134
Feldshammer feldspar for Kona F-4
Results:
Base is a smooth, semi mat milky glaze. Waxy and Vellum quality.
Colorants added and results:
2 Cobalt Carb.
Lavender Blue
2 Cobalt Carb.=20
1 Tin Oxide
White Lavender Blue
1 Cobalt Carb.
2 Chrome=20
Teal green
10 Rutile
Beige and pink fur
10 RIO
Brown with some breaking Black..
10 Zirocpax
Bright White
Regards from Alisa in Denmark
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