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glaze test for m. barringer super dry mat glaze, cone 6, ox.

updated tue 26 jun 01


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)

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 =

Best regards,
Alisa in Denmark