Alisa Clausen on wed 2 may 07
Glaze test for 1911 Purple/Blue, Cone 6, Redux.
Source: Ceramic Arts Buyer's Guide, 2007
Credited to: Pat Horsley
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 30 minutes
Shut off kiln
Colorants or additives to a 100 gram batch are measured in percent to the
100 gram batch.
40 Barium Carbonate
2 Ball Clay--C & C
6 Copper Carbonate
Semi mat, opaque, smooth dark blue to turquoise glaze. Darkest purple-blue
where thickest and aqua and turquoise where thinner around edges and high
areas on test tile.
Best regards from Alisa in Denmark