Alisa og Claus Clausen on mon 21 may 01
Glaze test for Puple, cone 6, oxidation.
Source: Ababi
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:
41.40 Neph. Syenite
11.70 Dolomite
5.40 Magnesium Carb.
4.50 Whiting
27 Quartz
10 Gerstely Borate
Add
1.0 Cobalt oxide.
All measurements measured up or down to the nearest whole decimal.
Substitutions: Local frit for Gerstely Borate.
Resulted in cobalt blue gloss.
Best regards,
Alisa in Denmark
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