METHOD OF PREPARING PRINTING INK Russian patent published in 2000 - IPC

FIELD: polygraphic industry. SUBSTANCE: method of preparing printing ink, mainly metallographic ink, by dispersing mixture, containing pigment, inorganic filler, binder in the form of polymer resin dissolved in mineral oil, and special additives including dryer, is distinguished by that filler is calcium carbonate supplemented by barium sulfate; dispersed product is filtered, aerated on three-roll machine, and then receives micronized polyethylene wax by way of mixing with the latter in vacuum mixer for 10-15 min while simultaneously automatically adjusting color of paste by adding dryer and readjusting color of ink. EFFECT: enabled preparation of wide color range ink, increased productivity, and reduced power consumption. 5 cl, 1 tbl