abstract |
A water-based pigment ink for ink-jet recording, which is excellent in preventing kogation, warming storage stability of ink, and maintainability, and capable of realizing abrasion resistance and light resistance in printing. A coloring agent containing A and B, a specific wetting agent, and an acetylene glycol surfactant are included. A: an azo pigment represented by the following general formula (1), B: a vinyl polymer containing a hydrophobic structural unit having a specific structure and a hydrophilic structural unit. (In general formula (1), Z represents a 5- or 6-membered heterocycle.) [Selection figure] None |