A method for the preparation of copper phthalocyanine - pigment in the beta - phase

摘要

A process for the preparation of β phase copper phthalocyanine pigment which includes dry grinding crude copper phthalocyanine in the absence of a grinding aid to obtain a crude mill; and conditioning the crude mill in about 5 to 50 wt.% based on the weight of the crude mill of a conditioning solvent.