Alisa Clausen on mon 21 feb 05
Glaze test for AC Albany Semi Mat, Cone 6 ox. and variations
Glaze tested on white midrange stoneware fired in electric oxidation to =
1240c. (2264f)
Source: Inspired by Lili Krakowski Albany slip substitute
Credited to: Alisa Clausen
Firing ramp:
100c p/h to 600c (212f - 1112f)
150c p/h to 1140c (302f - 2084f)=20
80c p/h to 1240c (176f - 2264f)
10 min. soak
cool down max. to 1100c (2012f)
Hold 1 hour
Shut off kiln
Recipe:
20 Oldenwalde Red Clay
20 Dolomite
20 Whiting
20 Frit J try 3134
20 Silica
ADD=20
2 Cobalt Carb.
Note: All raw materials are measured up or down to the nearest half =
decimal. =20
Colorants or additives to a 100 gram test batch are measured in percent =
to the 100 gram test batch.
Results:
A dark grey semi mat glaze with a green cast. Cobalt blue gloss where =
thinnest.
Recipe plus 5 Rutile
Gloss grey blue glaze. Where very thick, the glaze pulled away to form =
transparent spots in the surface. Where thick, the=20
glaze is a whitish blue and where thinnest, it is cobalt blue.
Original recipe minus Cobalt Carb.
A semi mat cream glaze with a yellow green cast where thickest.
Original recipe minus Cobalt Carb., plus 5 Rutile
A semi mat cream glaze with a yellow green cast where thick. Where =
thickest, the glaze become opalescent blue.
Regards from Alisa in Denmark
| |
|
