Alisa Clausen on thu 3 feb 05
Glaze test for Opal Blue/Strontium, cone 6 ox.
Glaze tested on white midrange stoneware fired in electric oxidation to =
1240c. (2264f)
Source: Clayart
Credited to:
Firing ramp:
100c p/h to 600c (212f - 1112f)
150c p/h to 1140c (302f - 2084f)=20
80c p/h to 1240c (176f - 2264f)
5 min. soak
cool down max. to 800c (1472f)
Hold 1 hour
Shut off kiln
Recipe:
37.8 Custerspar
24.9 Flint
22.8 G.B.
3.1 Strontium Carb.
11.2 Whiting
ADD
0.4 Cobalt Carb.
3 Rutile
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.
Results:
Gloss, opaque and covering glaze. Pale blue periwinkle color, even =
where thick and thinner.
Regards from Alisa in Denmark
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