| 摘要 |
To provide an aqueous ink for inkjet recording, which realizes excellent ink ejection properties, tinctorial strength, and image fastness using an aqueous pigment dispersion. An aqueous pigment dispersion containing A and B,
wherein A is an azo pigment represented by the following formula and in a crystal form having at least one characteristic peak at Bragg angles (2¸) of 5 to 15° and 20 to 30° in. X-ray diffraction with characteristic Cu Ka line, a tautomer, a salt or hydrate thereof; and
B is a vinyl polymer containing a specific structural unit, a structural unit derived from a salt-forming group-containing monomer (a), and a structural unit derived from a monomer selected from a styrene series macromer (b) and a hydrophobic monomer (c), provided that the water-insoluble vinyl polymer has at least either of 2 or more hydroxyl groups and 1 or more carboxyl groups at the end of the main chain: |
