Alternative
Names |
Potash Feldspar
, Potash Spar
, Orthoclase
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Generic
Formula
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K2O.Na2O.6SiO2 |
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| Flux |
Stabiliser |
Glass Former |
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Data Type |
Unity Formula (Seger)
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Description |
Feldspars are major fluxes in all clay bodies, secondary fluxes in low temperature glazes, and the principal materials and fluxes in high temperature stoneware glazes.
Potash Feldspar (also known as Orthoclase, Potash spar)
The most common and widely used feldspar. It starts to melt at about 1150C and forms into a stiff glaze at about 1200C, but to turn it into a useable glaze requires additional silica and fluxes like whiting or talc or dolomite for stoneware.
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