Scarva Raw Materials Chammotte 20s-90s (Coarse) RM1503 From £3.82

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Scarva Raw Materials LogoRM1503

Chammotte 20s-90s (Coarse)

Corderite Grogs
Created by crushing virgin kiln shelves; they are an alternative to firebrick grogs for colour yet do not have the lime-popping problem often associated with firebrick.

Grog (ground, fired body) is added to some clays to provide a proportion of fired and often refractory material to the body. This adds texture, along with bite, for better control during forming. The grog also acts as an opener and helps the clay to dry uniformly. As the grog is already fired it also cuts down on the overall shrinkage thus reducing problems of cracking and warping. Most are fired to high temperatures of at least 1300ºC.
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