| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide clear printing ink of a β-type copper phthalocyanine pigment by reducing much time and labor related to a step of converting crude copper phthalocyanine into a pigment and a step of manufacturing the printing ink. <P>SOLUTION: In the method of manufacturing the printing ink containing β-type copper phthalocyanine where the aspect ratio of pigment primary particles in the printing ink is 1-2, an α-type copper phthalocyanine containing the crude copper phthalocyanine and copper phthalocyanine derivative is dry-pulverized together with a resin for printing ink, and then the obtained pulverized material is heated in a solvent for printing ink or varnish. <P>COPYRIGHT: (C)2012,JPO&INPIT |
