Alisa Liskin Clausen on thu 13 jun 02
Glaze test for White Crackle fired to 1220c. ox.
Source: The Potters Manual, Kenneth Clark
Attributed to
Glaze tested on white midrange stoneware fired in electric oxidation to =
1220c.
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 900c (1652f)
hold for one hour at 900c
shut off kiln
Recipe:
80 Soda Feldspar
10 Kaolin
10 Whiting
Note: The example was fired to 1275 and showed large crackling, like a =
raku firing. =20
The fired pot was refired after the cracks were filled with Iron oxide =
to get a smooth surface.
All raw materials are measured up or down to the nearest whole decimal. =
Colorants or additives to a 100 gram test batch are measured in precent =
to the 100 gram test batch.
Substitutions: None
Results: Test was underfired and no crackling. A smooth white matte. =
If someone tries this test higher,
would appreciate hearing results.
Regards from Alisa in Denmark
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