FIELD: paint and varnish industry. SUBSTANCE: schungite-containing shale is crushed in auger breaker, ground in ball mill up to particle size 1.0-1.5 mm, concentrated up to schungite content 15-25 wt.-% loaded into grinder and milled up to the size below 40 mcm. Pigment density is 2 g/cm3 which is well dissolved in resins, varnishes, water and water glass, its suspensions are homogeneous, stable and have no tendency for separation. EFFECT: improved method of pigment preparing.
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