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glaze test for vc72, cone 6 ox, plus colorants

updated wed 30 apr 03


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 =

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

24 Neph. Syenite
11 Dolomite
12 Gerstely Borate
4 Whiting
2 Zinc Ox.
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.

Frit 623 for Gerstely Borate.

A clear gloss glaze that is shiny but not brilliant. Has a soft sheen.
Butter Gold
12 Titanium
Resulted in a tile white gloss glaze, well covering.

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.
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