Alternative
Names |
Cornwall Stone
, China Stone
, Carolina Stone
, Pegmatite
, Graven
, Manx Stone
|
Back to Material List |
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| Flux |
Stabiliser |
Glass Former |
| K2O |
0.281
|
| Na2O |
0.448 |
| CaO |
0.255 |
| Mg0 |
0.016 |
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Data Type |
Unity Formula (Seger)
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Description |
This is a crushed rock (partially decomposed granite) which is not a single material like china clay or silica, but is composed of feldspar, quartz baolinite, mica and fluorspar. It is sometimes used as a substitute for feldspar as it contains several fluxes such as soda, potash, magnesia and calcia. It is also used to give whiteness to bodies as it is almost free of iron and is used in both high and low firing glazes. |
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