Alisa Liskin Clausen on sun 8 sep 02
Glaze test for Crystal Glaze, cone 6, ox.
Glaze tested on white midrange stoneware fired in electric oxidation to =
1220c.
Source:
Credited to:
Firing ramp:
100c up/he to 600c (212f - 1112f)
150c up/he to 1100c (330f - 2012f)=20
100c up/he to 1220c (212f - 2228f)
cool down max. per hour to 1100c=20
cool 80c per hour to 800c
shut off kiln
Recipe:
1.0 Kaolin
21 Flint
26 Zinc Oxide
52 Borax Frit
ADD
0.5 Nickel Oxide
2.0 Rutile
1.0 Copper Carb.
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: None
Results:
Fluid gloss glaze with a light green to turquoise ground. Blue/grey =
crystals and milky white grounds where thicker. Pooled in a clear
grass green glass.
Regards from Alisa in Denmark
Ron Roy on fri 13 sep 02
I calculated with frit 3124 - short of silica and alumina - over supplied
with Zinc - not stable - expansion low enough to not craze on many bodies.
RR
>Glaze test for Crystal Glaze, cone 6, ox.
>Glaze tested on white midrange stoneware fired in electric oxidation to 1220c.
>
>Source:
>Credited to:
>
>Firing ramp:
>100c up/he to 600c (212f - 1112f)
>150c up/he to 1100c (330f - 2012f)
>100c up/he to 1220c (212f - 2228f)
>cool down max. per hour to 1100c
>cool 80c per hour to 800c
>shut off kiln
>
>Recipe:
>1.0 Kaolin
>21 Flint
>26 Zinc Oxide
>52 Borax Frit
>
>ADD
>0.5 Nickel Oxide
>2.0 Rutile
>1.0 Copper Carb.
>
>Note: 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 percent to
>the 100 gram test batch.
>
>Substitutions: None
>Results:
>Fluid gloss glaze with a light green to turquoise ground. Blue/grey
>crystals and milky white grounds where thicker. Pooled in a clear grass
>green glass.
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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