Patent ID: 8857965

Claim:
An ink composition comprising: a porphyrazine compound represented by Formula (1) below or a salt thereof and an aromatic compound having a carboxy group and/or a salt thereof, (wherein rings A to D represented by broken lines each independently represent a benzene ring or a 6-membered nitrogen-containing heteroaromatic ring, each of which is condensed with a porphyrazine ring, wherein the average value of the number of the nitrogen-containing heteroaromatic rings is higher than 0.00 and equal to or lower than 3.00, and the remaining are benzene rings, E represents a C2-C12 alkylene, X represents a sulfoanilino group, a carboxyanilino group, a phosphonoanilino group, a sulfonaphthylamino group, a carboxynaphthylamino group or a phosphononaphthylamino group, each of which may have one or two substituent groups selected from the group consisting of a sulfo group, a carboxy group, a phosphate group, a sulfamoyl group, a carbamoyl group, a hydroxy group, a C1-C6 alkoxy group, an amino group, a mono(C1-C4)alkylamino group, a di(C1-C4)alkylamino group, a mono(C6-C10)arylamino group, a di(C6-C10)arylamino group, a C1-C3 alkylcarbonylamino group, a ureide group, a C1-C6 alkyl group, a nitro group, a cyano group, a halogen atom, a C1-C6 alkylsulfonyl group, and a C1-C6 alkylthio group, R represents a hydrogen atom; a sulfo group; a carboxy group; a phosphate group; a sulfamoyl group; a carbamoyl group; a hydroxy group; a C1-C6 alkoxy group; an amino group; a mono(C1-C6)alkylamino group; a di(C1-C6)alkylamino group; a monoarylamino group; a diarylamino group; a C1-C3 alkylcarbonylamino group; a ureide group; a C1-C6 alkyl group; a nitro group; a cyano group; a halogen atom; a C1-C6 alkylsulfonyl group; or an alkylthio group, F (group) represents a phenyl group, or a 6-membered nitrogen-containing heteroaromatic ring, a represents an integer of 1 to 6, b represents an average value equal to or higher than 0.00 and lower than 3.90, c represents an average value equal to or higher than 0.10 and lower than 4.00, and an average value of a total of b and c is equal to or higher than 1.00 and is lower than 4.00), and a compound represented by Formula (2) below, (wherein M represents a hydrogen atom, a metal element, metal oxide, metal hydroxide, or metal halide, and Z 1 to Z 4 each independently represent an alkyl group, a cycloalkyl group, an alkenyl group, an aralkyl group, an aryl group, or a heterocyclic group, particularly, an alkyl group, an aryl group or a heterocyclic group, each of which may further have a substituent group).