| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a pigment composition readily dispersible in an aqueous medium through a single process without using a large quantity of water or a solvent. SOLUTION: This method for producing a pigment composition comprising a dry-pulverized pigment, an acetylene group-contg. nonionic surfactant and a water-soluble resin, comprises dry-pulverizing a coarse particle-contg. pigment in the presence of an acetylene group-contg. nonionic surfactant and a water-soluble resin, alternatively, dry-pulverizing a coarse particle-contg. pigment in the presence of an acetylene group-contg. nonionic surfactant followed by addition of a water-soluble resin and then further dry-pulverizing the resultant blend. The other objective aqueous pigment dispersion is obtained by dispersing the above pigment composition in water.
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