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AssigneeDIC Corporation
InventorsKohei Hayakawa, Kenji Sugo, Yoshihiro Sato, Yutaro Ueda, Hiroyuki Oominato, Shinichi Okada
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The problem to be solved by the present invention is to provide a method for producing an aqueous pigment dispersion that has certain dispersion stability with which the formation of coarse particles with time and the settling of a pigment and the like with time can be reduced and that can be used for producing an ink having excellent discharge stability. The present invention relates to a method for producing an aqueous pigment dispersion, the method including kneading a composition including a pigment including one or more materials selected from the group consisting of a violet pigment, a green pigment, and an orange pigment and a resin, the composition having a nonvolatile content of 50% by mass or more, under predetermined conditions and subsequently performing a centrifugation treatment.
A method for producing an aqueous pigment dispersion, the method comprising a step [1] of kneading a composition (a1) including a pigment including one or more materials selected from the group consisting of a violet pigment, a green pigment, and an orange pigment and a resin, the composition (a1) having a nonvolatile content of 50% by mass or more, to produce a kneaded material (a2);
Dependencies are inferred from the claim text.