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Lustre Colors

In ceramics, metal oxides can be employed to produce metallic and iridescent effects. These are typically done on a third firing, often with reduction atmosphere.

Details

Lustres are micro-thin coatings of metallic substances fired at comparatively low temperatures (e.g. cone 018, 1350F) onto an already-fired glaze surface. They produce metallic and iridescent effects. Common materials used in lustres are metal oxides chlorides of tin, barium, silver and sodium, bismuth subnitrate (even gold, and platinum compounds).

Books:

Ceramic Colours and Pottery Decoration by Kenneth Shaw, published by Maclaren and Sons Ltd., London, 1962, reissued 1968.
Lustres by Margery Clinton, published by BT Basford Ltd. London, 1991. This book covers how to make and use lustres.

Lustreware pitcher by Jonathan Chiswell Jones

Lustreware pitcher by Jonathan Chiswell Jones

The process he has evolved requires 3 firings. First, the dry porcelain ware is spray-decorated with metal oxides (iron, manganese, copper, chrome and cobalt oxides) and then high bisque fired to cone 9 to bond them on and vitrify the body. Then a cover of lead borosilicate glaze is fired on at cone 04. The lustres (made of clay, which washes off after the lustre firing, mixed wtih silver chloride or silver carbonate) are mostly applied with a brush over the fired 04 glaze and reduction fired on at cone 018. He makes red by blending copper carbonate and bismuth sub nitrate with the clay, and this can be mixed with the silver clay paste to make a ‘gold’. He also sometimes adds silver to the oxide sprays which creates a lustrous underglaze.

Links

Glossary Overglaze
A method of applying decoration over the glaze surface of ceramics. It can be done before or after the glaze firing.
URLs http://www.porcelainpainters.com/ppioclass/beglesson2/page_2.htm
China paints
URLs https://www.ideals.illinois.edu/bitstream/handle/2142/53413/productionoflust00king.pdf
Production of Lustres by C.L. King

By Tony Hansen


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