0 - 0,2mm with 25% chamotte. See technical data here. Firing range 1000 - 1280ºC. Beautiful lava dot clay with fine grained grog. Very good for throwing. Dots are visible even in coloured glazes making a lively surface.
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GS1100 Semi-Porcelain
Firing range 1200 - 1280ºC. See technical data here. Easier to work with than porcelain mass. Colour after firing is notably whiter than traditional light stoneware clays.