| abstract |
[PROBLEMS] To provide an aqueous pigment dispersion having excellent dispersion stability. Furthermore, in the case of an ink jet recording liquid using the aqueous pigment dispersion, the ejection stability at a nozzle required as the ink jet recording liquid, resolubility, and an organic pigment type having a sufficient print density when printing is performed. An object of the present invention is to provide an aqueous inkjet recording liquid. SOLUTION: A surface-treated organic pigment having a sulfonic acid group introduced into the particle surface obtained by treating an organic pigment particle with a sulfonating agent is formed into a salt with an amine compound or ammonia and dispersed in an aqueous medium. Aqueous pigment dispersion. |