slate powder

slate powder

A very fine powder obtained by pulverizing slate; used in paint as a dark-extender pigment.
References in periodicals archive ?
Examples of components in dryly friction pads Binder Fibers Mineral filler Phenolic resin Steel wool Mica Mela mine resin Brass wool Slate powder Natural rubber Fibre glass Kaolin Basalt fibre Barium sulphate Wcllastonlte Chalk Araroid Oxide Metals Antiseize Zinc oxide Iron Graphite Magnesium oxide Copper Sulphite Feric oxide Zinc Coke Chromium oxide Brass Aluminium oxide Bronze Silicon oxide