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glaze test for mat black, cone 6, ox. jayne shatz cm article

updated wed 10 may 06


Alisa Liskin Clausen on tue 9 may 06

Glaze test for Mat Black, cone 6, ox. Jayne Shatz CM article

Source: CM September 2005

Credited to:

Fired on mid fire white stoneware.

Firing ramp with an electric controller is:
100c p/h to 600c (212f - 1112f)
150c p/h to 1140c (302f - 2084f)
80c p/h to 1220c (176f - 2228f)
15 min. soak
cool down max. to 900c (1652f)
Hold 1 hour
Shut off kiln


18.4 Barium Carb.

8 Gerstley Borate

36.8 Custer Spar

18.4 Barnard Clay subbed local red clay

9.2 EPK Kaolin

9.2 Silica


2.4 Cobalt Oxide

3.4 Copper Oxide

2.3 RIO

9.2 Zinc Oxide

Note: All raw materials are measured up or down to the nearest half
decimal. Colorants or additives to a 100 gram batch are measured in percent
to the 100 gram batch.


Mat, oversaturated, possibly underfired, black glaze, some pinholing

Regards from Alisa in Denmark