CONE 6 Glazes Oxidation

Written By Georgia Keenan

These glazes are tested on scarva grogged white stoneware, fired to cone 6 (1220’c) in a small test kiln with a 15 min soak.

Glaze 1

F4 Feldspar - 36.5%

Quartz - 32.7%

Whiting - 13.5%

Ball Clay - 5.7%

Zinc Oxide - 11.6%

Copper Carbonate - 0.6%

Bentonite - 2%

Glaze 2

Custer Feldspar - 40.8%

Quartz - 27.5%

Whiting - 12.1%

Magnesium Carbonate - 3.4%

Barium - 12.15%

Gerstley Borate 7.1%

Copper Carbonate - 1.5%

Rutile 3.9%

Bentonite - 2%

Glaze 3

Custer Feldspar - 40%

Quartz - 16%

Whiting - 16%

Kaolin - 10%

Gerstley Borate 18%

Copper Carbonate - 0.75%

Bentonite - 2%

Glaze 7 (beware matte at cone 6, glossy at cone 7)

F4 Feldspar - 50%

Quartz - 4%

Kaolin - 11%

Barium - 14.63%

(FF 3134) borax frit - 24%

Copper Carbonate - 3%

Bentonite - 2%

Glaze 13

(FF 3110) high alkaline frit- 47.55%

Quartz - 24.8%

Zinc Oxide - 21.77%

Gerstley Borate - 5.88%

Rutile - 6%

Copper Carbonate - 1.5%

Glaze 15

(FF 3110) high alkaline frit- 47.55%

Zinc Oxide - 24%

Quartz - 20%

Custer Feldspar - 5%

Dolomite - 5%

Cornish Stone - 3%

Wollastonite - 3%

Copper Oxide- 3%

Titanium Dioxide - 5%

Lithium Carbonate - 3%

Glaze 18 (slow cooling result crystallises and creates matte white iridescent surface)

Quartz - 31%

Custer Feldspar - 24.5%

Dolomite - 17%

(FF 3134) borax frit - 14%

Zinc Oxide - 6.5%

Kaolin - 5%

Talc - 2%

Copper Oxide- 2%

Bentonite - 2%

Georgia Keenan
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