| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a recording ink set for inkjet, high in the image density and excellent in discharge stability and liquid stability. <P>SOLUTION: The recording ink set for inkjet includes a cyan ink, a magenta ink, a yellow ink and a black ink. The cyan ink, the magenta ink, the yellow ink and the black ink include at least a pigment, a surfactant, water, a water-soluble organic solvent and an anionic self-emulsifying ether-based polyurethane, and are obtained by mixing a pigment dispersion dispersed in water by using the surfactant and a pigment dispersion coated with a resin polymer and dispersed in water. The average particle diameter A (D50) of the pigment dispersion dispersed in water by using the surfactant and the average particle diameter B (D50) of the pigment dispersion coated with a resin polymer and dispersed in water satisfy the following relationship: ¾A-B¾≤30 nm. <P>COPYRIGHT: (C)2013,JPO&INPIT |
