Ink set and ink-jet color recording method using the same
AssigneeCanon Kabushiki Kaisha
InventorsAkio Kashiwazaki, Yuko Suga, Hiroyuki Ishinaga, Hiromichi Noguchi, Yutaka Kurabayashi, Aya Takaide, Kiyomitsu Kudo
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Abstract
Disclosed herein is a set of water-based pigment inks for ink-jet, comprising a black pigment ink and other pigment inks different in hue from the black pigment ink, which the pigment inks each comprise water, a water-soluble organic solvent and an aqueous pigment dispersion, wherein respective polymeric dispersants used in the black pigment ink and the other pigment inks different in hue from the black pigment ink are different in polarity from each other.
Claims30
An ink set for ink-jet recording, comprising a cationic black ink comprising carbon black and a water-soluble cationic polymer and an anionic color ink, wherein the carbon black has a pH value of from 7 to 10, has an average particle diameter of 80 to 200 nm, and is contained in the ink at an amount of 1 to 20% by weight, and
- wherein the water-soluble cationic polymer comprises at least a (meth)acrylic ester or (meth)acrylamide monomer having a tertiary amine salt or quaternary ammonium group.
A cationic black ink for ink-jet recording comprising carbon black and a water-soluble cationic polymer, wherein the carbon black has a pH value of from 7 to 10, has an average particle diameter of 80 to 200 nm, and is contained in the ink at an amount of 1 to 20% by weight, and
- wherein the water-soluble cationic polymer comprises at least a (meth)acrylic ester or (meth)acrylamide monomer having a tertiary amine salt or quaternary ammonium group.
A cationic black ink for ink-jet recording comprising carbon black and a water-soluble cationic polymer, wherein the carbon black has a pH value of from neutral to alkaline, has an average particle diameter of from 80 to 200 nm, and is contained in the ink at an amount of 1 to 20% by weight, and
- wherein the water-soluble cationic polymer comprises at least a (meth)acrylic ester or (meth)acrylamide monomer having a tertiary amine salt or quaternary ammonium group.
An ink-jet recording process for recording an image, the image comprising a black image and a color image on a recording medium, comprising a step of ejecting a cationic black ink and an anionic color ink from respective ink-jet nozzles and attaching the respective inks on the recording medium, wherein the cationic black ink comprises carbon black having a pH value of from 7 to 10, having an average particle diameter of 80 to 200 nm, and that is contained in the ink at an amount of 1 to 20% by weight, and a water-soluble cationic polymer comprising at least a (meth)acrylic ester or (meth)acrylamide monomer having a tertiary amine salt or quaternary ammonium group.
Dependencies are inferred from the claim text.