FIELD: manufacture of building materials. SUBSTANCE: grainy material, in particular quartz sand, stone crumb, etc., is treated by circumferentially displacing cylindrical chamber at a speed of 300- 700 rpm and rotation diameter 0.2-0.6 the internal diameter of chamber, the latter being charged with dyestuff in the form of suspension containing adhesive substance, dye, and water in respective amounts 0.1-1.0, 0.3-2.0, and 2.0-5.0% of the weight of material to be dyed. EFFECT: improved quality of dyed grainy material. 1 tbl, 3 ex
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