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Joyce St. Clair
Joyce St. Clair’s small blue cup, 3½ in. (9 cm) in
height, porcelain, underglaze, clear glaze, John Gill
Blue (JGB) Glaze, oxidation fired to cone 6, 2015.
John Gill Blue (JGB) Glaze
Cone 05–03 Oxidation
Gerstley Borate . . . . . . . . . . . . . . . . .
Ferro Frit 3110. . . . . . . . . . . . . . . . . .
EPK Kaolin. . . . . . . . . . . . . . . . . . . . .
Silica . . . . . . . . . . . . . . . . . . . . . . . . .
6%
77
7
10
100%
Add: Copper Carbonate. . . . . . . . . . 3%
Cobalt Carbonate. . . . . . . . . . . 1%
Emerging Artist Joyce St. Clair sourced this
recipe from Val Cushing’s Handbook—Third
Edition. It has a firing temperature of cone
05–03 but she layers it over clear and other
glazes and fires it up to cone 6 or 7 to promote fluxing to complement the surfaces of
her forms.
Detail of JGB Glaze over a cone 6 clear glaze.
Find more recipes from this year’s emerging artists in the May 2015 issue of Ceramics Monthly !
www.ceramicsmonthly.org
may 2015