配方类型：	CERAMICS AND GLASS
配方说明：	Refractory coating for Graphite Molds (U.S. Patent 2,857,285)
配方组成：	Ball Clay/0.5-3.5 Fused Alumina/95-99 Soluble Silicate/0.1-0.5 Bentonite/0.5-2
配制方法：	All above 3.3 to 44 microns in size. Make into a slurry with water for use.

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