Alisa Liskin Clausen on sun 22 oct 06
Glaze test for Cartwright Black, cone 6, ox.
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
73.5 Custer spar (used Forshammer feldspar)
4.1 GA Kaolin (used EPK)
10 Gerstely Borate (used Boron Frit)
4.1 Copper Carb.
2 Cobalt Carb.
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.
Gloss, metallic, opaque black glaze. Slightly brownish in strong sun light.
Regards from Alisa in Denmark