Process for producing crystalline I-type oxytitanium phthalocyanine

摘要

The present invention relates to a process for producing a crystalline I-type oxytitanium phthalocyanine having strong peaks in CuK alpha characteristic X-ray diffraction at Bragg angles (2 theta +/-0.2 DEG ) of 9.0 DEG , 14.2 DEG , 23.9 DEG , and 27.1 DEG , comprising milling-treatment of oxytitanium phthalocyanine or an aqueous paste thereof with a solvent containing a saturated hydrocarbon solvent.