Invention Grant
US09096770B2 Inkjet recording ink set, ink cartridge, inkjet recording device, inkjet recording method, and image formed matter 有权
喷墨记录油墨组,墨盒,喷墨记录装置,喷墨记录方法和图像形成物

Inkjet recording ink set, ink cartridge, inkjet recording device, inkjet recording method, and image formed matter
Abstract:
To provide an inkjet recording ink set, which contains a cyan ink, magenta ink, yellow ink, and black ink, wherein each ink contains at least a pigment, a surfactant, water, water-soluble organic solvent, and anionic self-emulsifying ether-based polyurethane, wherein each ink contains, as the pigment, a combination of a (i) pigment dispersion liquid, in which the pigment is dispersed in water with assistance of the surfactant, and a (ii) resinous polymer-coated pigment dispersion liquid, in which the pigment is coated with a resinous polymer and dispersed in water, and wherein the (i) pigment dispersion liquid and the (ii) resinous polymer-coated pigment dispersion liquid satisfy the following formula: |A−B|≦30 nm where A is the average particle diameter (D50) of the dispersed pigment in the (i) pigment dispersion liquid, and B is the average particle diameter (D50) of the dispersed resinous polymer-coated pigment in the (ii) pigment dispersion liquid.
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