| abstract |
(57) [Summary] [Problem] A pigment which can be applied to fields such as an ink jet recording liquid, a colorant composition for a color filter, and a printing ink. And a method for producing a pigment dispersion having extremely high pigment dispersion stability. SOLUTION: A mixture containing a pigment, at least one selected from the group consisting of a polymer emulsifier having a HLB of 5 or more and a surfactant, and an aqueous medium is passed through an orifice having no curved portion or bent portion under pressure. And further resides in a hollow member having a diameter larger than the orifice, A method for producing an aqueous pigment dispersion in which a pigment is dispersed in an aqueous medium by discharging the mixture into the mixture that has flowed out earlier. |