Patent ID: 8465553

Claim:
A pigment dispersion composition comprising an azo pigment represented by formula (1), in which the azo pigment represented by formula (1) does not have an ionic hydrophilic group, an azo pigment derivative and a dispersant: wherein in formula (1), G represents a hydrogen atom, an aliphatic group, an aryl group or a heterocyclic 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 any one of the following formulae (A-1) to (A-32); m represents an integer of 0 to 5; and n represents an integer of 1 to 4, wherein: when n=2, the azo pigment is a dimer formed via R 1 , R 2 , A or G; when n=3, the azo pigment is a a trimer formed via R 1 , R 2 , A or G; and when n=4, the azo pigment is a tetramer formed via R 1 , R 2 , A or G: wherein in formulae (A-1) to (A-32), R 51 to R 59 each independently represents a hydrogen atom or a substituent that may be bonded to an adjacent substituent to form a 5- or 6-membered ring, and * represents a position to be bonded to the azo group in formula (1).