Water-based pigment ink, and ink-jet recording method and instruments using the same
AssigneeCanon Kabushiki Kaisha
InventorsKoichi Osumi, Yoshifumi Hattori, Yoshihisa Takizawa, Ryuji Katsuragi, Hisashi Teraoka
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Abstract
Disclosed herein is a water-based pigment ink comprising a coloring material composed of self-dispersing carbon black obtained by bonding at least one hydrophilic group directly or through another atomic group to the surface of carbon black, a humectant of the general formula H--(CH.sub.2).sub.m --C--((CH.sub.2).sub.n OH).sub.3 wherein m and n are independently an integer of from 1 to 5, and an aqueous medium composed of water and a water-soluble organic solvent.
Claims27
A water-based pigment ink comprising a coloring material composed of self-dispersing carbon black obtained by bonding at least one hydrophilic group through another atomic group to the surface of carbon black, a humectant of the general formula
- H--(CH.sub.2).sub.m --C--((CH.sub.2).sub.n OH).sub.3
- wherein m and n are independently an integer of 1 to 5, and an aqueous medium composed of water and a water-soluble organic solvent.
A water-based pigment ink comprising a coloring material composed of self-dispersing carbon black obtained by bonding at least one hydrophilic group through an alkylene group having 1 to 12 carbon atoms, a phenylene group which may be substituted, or a naphthylene group which may be substituted, to the surface of carbon black, trimethylolpropane, and an aqueous medium composed of water and a water-soluble organic solvent.
Dependencies are inferred from the claim text.