Patent ID: 8609747

Claim:
An aqueous pigment dispersion comprising A and B, wherein A represents an azo pigment represented by the following general formula (1) and having at least one characteristic peak at Bragg angles, 2θ, of 5° to 15° and 20° to 30° in X-ray diffraction with characteristic Cu Kα line, a tautomer thereof, or a salt or hydrate thereof formula (1): wherein, Z represents a 5- to 6-membered heterocyclic ring, Y 1 , Y 2 , R 11 , and R 12 each independently represents a hydrogen atom or a substituent, G 1 and G 2 each independently represents a hydrogen atom, an alkyl group, an aralkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group, and W 1 and W 2 each independently represents an alkoxy group, an amino group, an alkyl group, or an aryl group: B is a vinyl polymer containing a hydrophobic structural unit (a) represented by the following general formula (AI) and a hydrophilic structural unit (c): wherein, R 1 represents a hydrogen atom, a methyl group, or a halogen atom, L 1 represents —COO—, —OCO—, —CONR 2 —, —O—, or a substituted or unsubstituted phenylene group, R 2 represents a hydrogen atom or an alkyl group, L 2 represents a single bond or a divalent linking group, and Ar 1 represents a monovalent group derived from an aromatic hydrocarbon ring.