Fired & ground Missouri “flint” clay. A coarse aggregate added to clay bodies to prevent cracking of large forms by reducing dry shrinkage. Also used to create rough textured surfaces and colour variation in dark clay bodies. Finer kyanite and mullite grogs suitable for throwing are also available.
For more information on grog in general, see the Digitalfire.com Reference Library of ceramic materials.
Different Raw Materials ordered in full bag qty (20 kg to 100 lb) will be combined at checkout for a volume discount if applicable.