Patent ID: 8864297

Claim:
A water-based ink set for ink-jet recording, comprising at least two kinds of water-based inks each of which contains a colorant, water, and a water-soluble organic solvent; wherein at least one water-based ink, among the at least two kinds of water-based inks, contains a dye represented by a general formula (1) as the colorant, and at least one water-based ink, among the at least two kinds of water-based inks, contains 0.5% by weight to 4% by weight of a cationic polymer, and weight average molecular weight of the cationic polymer is not less than 1200: in the general formula (1): n 1 is 1 or 2, each of three Ms is sodium or ammonium and the three Ms may be same or different from one another, and R 0 represents a monoalkylamino group substituted by a carboxyl group and having a number of carbon atoms of 1 to 8.