| abstract |
(57) [Summary] [Problem] It does not require long-time processing by a dispersing device, Provided is a pigment dispersion having high dispersion stability and size uniformity and excellent in transparency on the order of nanometers, which does not depend on the size of primary particles of a pigment as a raw material, and a method for producing the same. Provided is an aqueous coloring liquid excellent in water resistance, light resistance, coloring and light transmission, particularly a recording liquid for inkjet. SOLUTION: A dissolving step of dissolving an organic pigment and a dispersant in an acid or a mixed solution of an acid and an organic solvent, and a step of depositing an organic pigment by mixing the pigment solution obtained in the dissolving step with water. And a process for producing an organic pigment dispersion. Organic pigment dispersion obtained by this method. An aqueous coloring liquid containing the organic pigment dispersion, particularly a recording liquid for inkjet. |