Alisa og Claus Clausen on mon 21 may 01
1250c-1360c (2282f-2300f) oxidation.
Glaze test for Pink Blue Matt Glaze, 1250c-1360c (2282f-2300f) =
oxidation.
Source:Emmanuel Cooper, Hamer and Hamer, page 401
WARNING: HIGH BARIUM CONTENT. USE NECESSARY ULTRA CAUTION WHEN =
HANDLING AND USE FOR DECORATIVE WORK ONLY.
Tested on light, mid-range stoneware, with iron flecks. Fired to 1215c =
(22219) oxidation, at this ramp:
100c to 600c 212f to 1112f
150c to 1100c 300f to 2012f
100c to 1220c 212f to 2228f
soak at 1220c for 30 minutes =20
cool down 100c per hour to 900c (212f/1652f)=20
soak at 900c for one hour
shut off and cool down (aprox. 40 hours)
Recipe:
35 Feldspar
5 China Clay
5 Flint
40 Barium carb.
15 Zinc. oxide
Add
1-3% Nickel oxide
This glaze is an example of the blues, pinks and greens that Emmanuel =
Cooper says are posible with a glaze mix that has 1-3% Nickel, 20-50% =
Barium carb. and 10% Zinc oxide.=20
All measurements measured up or down to the nearest whole decimal.
Substitutions: None
Resulted in what the suggested result would be, although fired only to =
1215c. A never by me seen before tan matt with medium blue and moss =
green speckling where once dipped, and a tan ground with larger pink, =
almost fuschia, pooling and speckling where double dipped. The overall =
surface is flat and matt, and the pink speckling looks lichen like. =
Although this glaze is so high in barium, I would like to see on a =
bigger, textured pot. Stayed where it was applied.=20
Best regards,
Alisa in Denmark
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