In a process for producing a chlorogallium phthalocyanine crystal comprising mechanically dry-grinding chlorogallium phthalocyanine and subjected to crystal conversion, the weight ratio of chlorogallium phthalocyanine to the grinding media is set at a range of from 1/5 to 1/1000. The resulting chlorogallium...http://www.google.fr/patents/US5588991?utm_source=gb-gplus-shareBrevet US5588991 - Process for producing chlorogallium phthalocyanine crystal
Process for producing chlorogallium phthalocyanine crystal
