62 march 2016 www.ceramicsmonthly.org

Tom Turner shares some of his iconic, high-fire reduction glazes that work well on porcelain and some helpful tips for using them.

RECIPES

cone 9 glazes by Tom Turner40A

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TOM TURNER’S MARS HILL COPPER RED (1)Cone 9 Reduction

Barium Carbonate . . . . . . . . . . . 2.77 %Gerstley Borate . . . . . . . . . . . . . 3.95Magnesium Carbonate . . . . . . . 2.77Whiting (Pfizer Vicron 41-8) . . . . 19.76Custer Feldspar . . . . . . . . . . . . . 49.41 EPK Kaolin . . . . . . . . . . . . . . . . 1.58Silica . . . . . . . . . . . . . . . . . . . . . 19.76 100.00 %

Add: Tin Oxide . . . . . . . . . . . . . . 1.00 % Zinc Oxide . . . . . . . . . . . . . 1.19 % Copper Carbonate . . . . . . . 0.45 % Bentonite . . . . . . . . . . . . . . 1.00 % Epsom salts . . . . . . . . . . . . 0.10 %

Copper red glazes cannot be applied thin. Epsom salts are added to prevent the glaze from settling.

TOM TURNER’S BLUE TEADUST (3)Cone 9 Reduction

Talc . . . . . . . . . . . . . . . . . . . . . . 9.26 %Whiting (Pfizer Vicron 41-8) . . . . 15.74Custer Feldspar . . . . . . . . . . . . . 39.81OM 4 Ball Clay . . . . . . . . . . . . . 10.19Silica . . . . . . . . . . . . . . . . . . . . . 25.00 100.00 %

Add Cobalt Carbonate . . . . . . . 3.24 % Iron Oxide . . . . . . . . . . . . . 2.78 %

This glaze layers well with Tom Turner’s Flambé glaze and iron-oxide wash.

TOM TURNER’S FLAMBÉ (3)Cone 9 Reduction

Barium Carbonate . . . . . . . . . . . 4.04 %Gerstley Borate . . . . . . . . . . . . . 4.62Magnesium Carbonate . . . . . . . 4.04Whiting (Pfizer Vicron 41-8) . . . . 14.43Ferro Frit 3195 . . . . . . . . . . . . . 1.01Custer Feldspar . . . . . . . . . . . . . 41.56EPK Kaolin . . . . . . . . . . . . . . . . . 4.33Silica . . . . . . . . . . . . . . . . . . . . . 25.97 100.00 %

Add: Tin Oxide . . . . . . . . . . . . . . 0.87 % Zinc Oxide . . . . . . . . . . . . . 1.73 % Copper Carbonate . . . . . . . 0.43 % Bentonite . . . . . . . . . . . . . . 1.01 %

Flambé glazes cannot be applied thin.

TURNER TEMMOKU (2)Cone 9 Reduction

Whiting (Pfizer 41-8) . . . . . . . . . 11.28 %Cornwall Stone . . . . . . . . . . . . . 63.90OM 4 Ball Clay . . . . . . . . . . . . . 6.02Silica . . . . . . . . . . . . . . . . . . . . . 18.80 100.00 %

Add: Red Iron Oxide . . . . . . . . . . 9.02 % Bentonite . . . . . . . . . . . . . . 1.50 %

My Temmoku glaze started with a glaze from the Harrow School of Art in England (their Cornwall 85, whiting 15 glaze). It requires different amounts of iron for stoneware and porcelain. The Cornwall stone has changed so much that I had to drastically change the glaze, so testing will be necessary.

1 Teapot, 11 in. (28 cm) in length, porcelain, Mars Hill Copper Red glaze with a wash of iron oxide and water over, fired to cone 9 in reduction, 2008. 2 Covered jar, 8 in. (20 cm) in height, porcelain, Temmoku glaze with a wash of iron oxide and water over, fired to cone 9 in reduction, 2006. 3 Vase with four bird sentinels, 9 in. (23 cm) in height, paddled, carved, and stamped porcelain, Blue Teadust and Flambé glazes, with a wash of iron oxide and water over, fired to cone 9 in reduction, 2003.

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