PROCESS FOR MAKING A PHTHALOCYANINE PIGMENT DISPERSION

摘要

PROCESS FOR MAKING A PHTHALOCYANINE PIGMENT DISPERSION A process for making an aqueous pigment dispersion comprising substantially 100 percent .beta.-phase, isometric copper phthalocyanine pigment particles is carried out by activating a pigment crude, followed by fine-milling the activated crude in the presence of an emulsion, the finemilling taking place in a stirring mill. The resulting pigment slurry is then isolated as an aqueous presscake.