Currie glaze tests by Kathy Greaves
Glaze tests carried out using Ian Currie's grid method, as outlined in Revealing Glazes
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Clay is IMCO Cone 5 porcelain Firing schedule was: 200F/hr to 250F, 400F/hr to 1900F, 200F/hr to 2000F, slowed to stall to 2144F, -500F/hr to 1900F, -150F to 1500F, kiln off. Large c/5 down, c/6 at 2 o' clock.
Corner C= Ferro Frit 3134 30%; Nepheline Syenite 30%; Whiting 20%; Talc 20%
Clay is IMCO 50/50 Stoneware. Firing schedule was: 200F/hr to 250F, 400F/hr to 1900F, 200F/hr to 2000F, slowed to stall to 2144F, -500F/hr to 1900F, -150F to 1500F, kiln off. Large c/5 down, c/6 at 2 o' clock.
Corner C= Frit 3134 46%; Custer Feldspar 38%; Talc 9%; Whiting 7%
Clay is IMCO Cone 5 porcelain. Firing schedule was: 200F/hr to 250F, 500F/hr to 2000F, 150F/hr to 2190, -150F/hr to 1500, kiln off. Large c/6 at 5 o' clock.
Corner C= Frit 3134 46%; Custer Feldspar 38%; Talc 9%; Whiting 7%
Clay is IMCO 50/50 stoneware. Firing schedule was: 200F/hr to 250F, 500F/hr to 2000F, 150F/hr to 2190, -150F/hr to 1500, kiln off. Large c/6 at 5 o' clock.
Corner C= Frit 3134 46%; Custer Feldspar 38%; Talc 9%; Whiting 7%
Clay is cone 10 porcelain, fired to cone 10 in reduction.
Corner C= Frit 3134 46%; Custer Feldspar 38%; Talc 9%; Whiting 7%
Clay is cone 10 stoneware, fired to cone 10 in reduction
Currie grids in pursuit of cobalt greens, page 1
More Currie grids in pursuit of cobalt greens, page 2