Patent ID: 7834067

Claim:
A pigment composition comprising at least: (A) a polyallylamine derivative which contains at least 1% to 50% by mol of a structural unit represented by the following Formula (1-a), from 49% to 95% by mol of a structural unit represented by the following Formula (1-b), and from 1% to 30% by mol of a structural unit represented by the following Formula (1-c); and (B) a pigment; wherein, in Formula (1-b), R 1 represents —NHCOR or —NH 3 + OCOR 3 , in which R 3 represents a residue obtained by removing a carboxy group from any one of polyester, polyamide or polyesteramide, each having a free carboxylic acid; and in Formula (1-c), R 2 represents —NHCOR 4 or —NH 3 + OCOR 4 , in which R 4 represents an organic group having an aromatic ring or a heteroaromatic ring.