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Ingredients

Ingredient Amount
Magnesium Carbonate 6.00
Talc 6.00
Whiting 14.00
Zinc Oxide 6.00
Custer Feldspar 52.00
EPK Kaolin 6.00
Silica 10.00
Add Amount
Copper Carbonate 5.00
Titanium Dioxide 2.00

Instructions


Use 2–8% titanium dioxide. The mug shown here is glazed with 6% titanium dioxide.

Acknowledgements for the origin of this recipe go to Ivan Albrecht at the University of Miami. Titanium dioxide was added in the following increments: 2%, 4%, 6%, and 8%. If titanium dioxide is omitted, silvery zinc oxide microcrystals are formed on the glaze surface (see 3A). The microcrystalline glaze is a gorgeous blue with purple or gold crystals in this same series of experiments when substituting 1% cobalt carbonate instead of 5% copper carbonate.

This recipe was shared by Ryan Coppage, PhD and Jenn Wicks in the April 2020 issue of Ceramics Monthly.

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