Pigment dispersion and use thereof

摘要

The invention relates to a pigment dispersion comprising: a condensate of or a salt between a polyallylamine and a polyester having a free carboxylic acid or the salt; a pigment derivative represented by the following general formula (1); a pigment; and an organic solvent, (P-X)^-[N(R₁, R₂, R₃, R₄)]⁺ general formula (1) wherein p represents an organic dyestuff residue; X represents a sulfonic acid group or a carboxylic acid group; R₁ represents an alkyl group having 5 to 20 carbon atoms; and R₂, R₃ and R₄ each independently represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms.