Solvent Black 7 Nigrosin uses for Solvent Base Ink , Phenolic Molding Compound , bakelite cloth rubber, plastic and leather, raw material of leather shoes Polishes , carbon paper and insulating paint resin coloring, plastic coloring (temp. over 280C Like Nylon, ABS etc), leather and fur coloring, printing ink, stationery ball-pen ink, positive charge control agent in electrostatic printing powder like Laser toner