PIGMENT DISPERSION COMPOSITION

PROBLEM TO BE SOLVED: To provide a pigment dispersion composition which has enhanced dispersion stability, solves the problem of sedimentation, exhibits a high color rendering property, and is useful for liquid developing agents and oily ink jet inks. SOLUTION: This dispersion is obtained by dispers...

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1. Verfasser: TAKAO NAGAYUKI
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a pigment dispersion composition which has enhanced dispersion stability, solves the problem of sedimentation, exhibits a high color rendering property, and is useful for liquid developing agents and oily ink jet inks. SOLUTION: This dispersion is obtained by dispersing an organic pigment in an organic solvent having an electric resistivity of >=107 Ω.cm. Therein, the organic pigment comprises a mixture of two or more kinds of quinacridone pigments, preferably a mixture of unsubstituted quinacridone with 2,9- dimethylquinacridone and/or 2,9-dichloroquinacridone.