Alisa Clausen on sun 2 nov 03
Glaze test for Burboe Glaze, cone 6 reduction, fired in oxidation.
Glaze tested on white midrange stoneware fired in electric oxidation to =
100c p/h to 600c (212f - 1112f)
150c p/h to 1100c (330f - 2012f)=20
100c p/h to 1220c (212f - 2228f)
5 min. soak
cool down max. to 800c
Hold 1 hour
Shut off kiln
6.8 Bone Ash
6.8 Barium Carb.
2.3 Lithium Carb.
22.7 F4 Feldspar
27.3 OM4 Ball Clay
4.5 Zinc Oxide
2.3 Red Iron Oxide
Note: All raw materials are measured up or down to the nearest whole =
Colorants or additives to a 100 gram test batch are measured in precent =
to the 100 gram test batch.
Oldenwalder clay for Albany
Feldshammer for F4
Zircon #5 for Opax
A mustard brown glaze with a varidgated surface. Areas of matte under a =
glossier surface with yellow speckling. Well covering glaze that is =
smooth to the touch. Stiff around bottom edge of tile even where thick.
Regards from Alisa in Denmark