| 摘要 |
A process for preparing a water-based pigment dispersion, including the steps of (A) mixing an emulsified composition containing a water-insoluble polymer having a salt-forming group, an organic solvent having a solubility of 5 to 40 parts by weight in 100 parts by weight of water at 20° C., a neutralizing agent and water with a pigment so that the content of non-volatile components in the mixture of the emulsified composition and the pigment is 15 to 50% by weight, and the weight ratio of the organic solvent to water (weight of organic solvent/weight of water) is 0.1 to 0.9; (B) dispersing the resulting mixture; and (C) removing the organic solvent from the mixture. The water-based pigment dispersion prepared by the process can be suitably used, for instance, in a water-based ink for inkjet recording being capable of giving an ink mechanical energy generated by piezoelectric element or the like, and thermal energy generated by a heating member, thereby jetting the ink from a jetting head.
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