Patent ID: 7611571
Filing Date: 2009-11-03
Classification: C09D

Abstract:
1. An ink comprising at least two coloring materials of a first coloring material and a second coloring material, wherein the first coloring material is a compound represented by the following general formula (I): wherein A, B, C, and D each independently represent a six-membered ring having aromaticity and at least one of A, B, C, and D in the general formula (I) is a pyridine ring or a pyrazine ring, M's each independently represent a hydrogen atom, alkali metal, ammonium, or organic ammonium, E's each independently represent an alkylene group, X's each independently represent a sulfo-substituted anilino group, a carboxyl-substituted anilino group, or a phosphono-substituted anilino group, and the substituted anilino groups may have 1 to 4 of at least one substituent selected from the group consisting of a sulfonic acid group, a carboxyl group, a phosphono group, a sulfamoyl group, a carbamoyl group, a hydroxyl group, an alkoxy group, an amino group, an alkylamino group, a dialkylamino group, an arylamino group, a diarylamino group, an acetylamino group, an ureido group, an alkyl group, a nitro group, a cyano group, halogen, an alkylsulfonyl group, and an alkylthio group, Y's each independently represent a hydroxyl group or an amino group, and 1, m and n satisfy 0≦1≦2, 0≦m≦3 and 0.1≦n≦3, and 1+m+n=1 to 4, and wherein the second coloring material is a compound represented by the general formula (II): wherein X