Alisa Clausen on tue 29 apr 03
Glaze test for VC72, cone 6, ox., plus colorants.
Glaze tested on white midrange stoneware fired in electric oxidation to =
1220c.
Source: Clayart
Credited to:
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 80c per hour to 800c
shut off kiln
Recipe:
24 Neph. Syenite
11 Dolomite
12 Gerstely Borate
4 Whiting
2 Zinc Ox.
7 EPK
40 Silica
2 Benotonite
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 623 for Gerstely Borate.
Results:
A clear gloss glaze that is shiny but not brilliant. Has a soft sheen.
=20
Butter Gold
12 Titanium
Resulted in a tile white gloss glaze, well covering.
Peacock
6 Copper ox.
0.5 Cobalt carb.
Resulted in a semi matt, mottled, smooth surface. The overall color is =
a medium green with a bluish nuance.
Very well covering.
0.5 Cobalt carb.
Resulted in a gloss, cobalt blue glaze that is uniform where thickest.
2 Cobalt carb.
6 Tin Oxide
Resulted in gloss, mottled, medium blue/violet glaze. Well covering =
where thickest.
12 Ochre
Resulted in a gloss, yellow glaze where thickest and browner where =
thinner. Well covering and smooth.
1 Cobalt Carb.
3 RIO
6 Rutile
Resulted in a gloss, medium brown glaze. Where thickest the glaze has a =
paler fuzzing on the surface.
Regards from Alisa in Denmark
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