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AssigneeCanon Kabushiki Kaisha
InventorsJunichi Sakai, Yoshio Nakajima, Makoto Aoki, Toshiaki Kaneko, Yoko Ichinose, Masashi Miyagawa
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A dispersible colorant, including a colorant and a chargeable resin pseudo fine particle having a sulfonic group, which is smaller than the colorant, in which the sulfonic group of the dispersible colorant has a surface functional group density of 100 μmol/g or more, is provided. The dispersible colorant has sufficiently high dispersion stability without causing detachment of the resin component from the colorant, while retaining long-term stability. The use of the dispersible colorant allows an aqueous ink-jet recording ink, which is excellent in discharge stability, an ink tank, an ink-jet recording apparatus, an ink-jet recording method, and an ink-jet recording image to be provided.
A dispersible colorant, comprising a colorant and a chargeable resin pseudo fine particle having a sulfonic group, which is smaller than the colorant, characterized in that
The dispersible colorant according to claim wherein the chargeable resin pseudo fine particle having the sulfonic group comprises a copolymer composed of at least one hydrophobic monomer and a hydrophilic monomer having at least a sulfonic group.
Dependencies are inferred from the claim text.