Patent ID: 6768006
Filing Date: 2004-07-27
Classification: C09B,G03G

Abstract:
A process for producing a phthalocyanine crystal comprising a phthalocyanine compound and a substituted or unsubstituted condensed polycyclic hydrocarbon compound, said process comprising subjecting a phthalocyanine compound to an acid pasting step including dissolving or dispersing the phthalocyanine compound in an acid which has been mixed with a substituted or unsubstituted condensed polycyclic hydrocarbon compound, the phthalocyanine compound being gallium phthalocyanine, the gallium phthalocyanine being hydroxgallium phthalocyanine, and having a crystal form characterized by strong peaks at Bragg angles 2&thgr; of 7.4 deg.+0.2 deg. and 28.2 deg.+0.2 deg.