Process for preparing pigment composition, pigment composition and its use

摘要

According to the present invention, a resin is added to crude copper phthalocyanine comprising an alpha -form and a beta -form crystals in combination and dry-milling is performed in a deoxygenated atmosphere, to provide copper phthalocyanine pigment composition of superior quality which reduces considerable expenditure of time and labor associated with the pigmentation process of crude copper phthalocyanine and the printing ink production process of a pigment, and printing ink comprising beta -form copper phthalocyanine pigment superior quality.