Alisa og Claus Clausen on sun 24 jun 01
Glaze test for M. Barringer Super Dry Mat Glaze, cone 6, ox.
Source: Ceramics Montly, April, 2001.
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:
5 Gerstely Borate
6 Lithium Carb.
15 Strontium Carb.
60 Neph. Syenite
8 Calcined Clay
6 Flint
All raw materials, with the exception of colorants, measured up or down =
to the nearest whole decimal.
Substitutions: None.
Resulted in a white mat glaze. Where very thick, it had grey, glassy =
streaking. Smooth surface.
Iron spots from glaze visible in glaze. Swelled but did not run on =
bottom edge of test.
Color variations possible with the addition of oxides, Carbonates and =
stains.
Best regards,
Alisa in Denmark
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