Patent ID: 8828132

Claim:
A pigment composition comprising: (A) an azo pigment represented by the following general formula (1); and (B) a pigment derivative having a hydrophilic group and represented by the following general formula (B1): wherein G represents a hydrogen atom, an aliphatic group, an aryl group, a heterocyclic group, an acyl group, an aliphatic oxycarbonyl group, a carbamoyl group, an aliphatic sulfonyl group, or an arylsulfonyl group; R 1 represents an amino group, an aliphatic oxy group, an aliphatic group, an aryl group, or a heterocyclic group; R 2 represents a substituent; A represents an aromatic 5- or 6-membered heterocyclic group; m represents an integer of from 0 to 5; n represents an integer of from 1 to 4; when n=2, the general formula (1) represents a dimer formed through R 1 , R 2 , A, or G; when n=3, the general formula (1) represents a trimer formed through R 1 , R 2 , A, or G; when n=4, the general formula (1) represents a tetramer formed through R 1 , R 2 , A, or G; and the general formula (1) does not comprise any ionic hydrophilic group; wherein P represents an azo series colorant residue; X represents —SO 3 .M/m or —COO.M/m, wherein M represents a counter cation selected from the group consisting of a hydrogen ion, a 1- to 3-valent metal ion, and an ammonium ion, and m represents a valence number of M, which is an integer of 1 to 3, and n1 represents an integer of from 1 to 4; and further provided that the pigment derivative is an azo series pigment derivative represented by the following general formula (B2), a tautomer, salt, or hydrate thereof: wherein G B2 represents a hydrogen atom, an aliphatic group, an aryl group, a heterocyclic group, or a hydrophilic group; R B21 represents an amino group, an aliphatic oxy group, a heterocyclic group connected at the nitrogen atom, or a hydrophilic group; R B2 to R B6 each independently represents a hydrogen atom or a substituent; A B2 represents an aryl group or a heterocyclic group; at least one of R B21 , R B2 to R B6 , and A B2 has —SO 3 .M/m or —COO.M/m; n B represents an integer of from 1 to 4; when n B =2, the general formula (B2) represents a dimer formed through R B21 , R B2 to R B6 , A B2 , or G B2 ; when n B =3, the general formula (B2) represents a trimer formed through R B21 , R B2 to R B6 , A B2 , or G B2 ; and when n B =4, the general formula (B2) represents a tetramer formed through R B21 , R B2 to R B6 , A B2 , or G B2 .