EP0692527A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ink set and ink-jet color recording method using the same
Assignee: Canon Inc
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Filing: 1995-07-12
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Granted: —
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Expires: 2015-07-12
Abstract
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.
Inventors
- 👤 Akio Kashiwazaki
- 👤 Yuko Suga
- 👤 Hiroyuki Ishinaga
- 👤 Hiromichi Noguchi
- 👤 Yutaka Kurabayashi
- 👤 Aya Takaide
- 👤 Kiyomitsu Kudo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 18:32
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40; Y; Y10; Y10S; Y10S260/00; Y10S260/38
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
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.
Claim 2
Dependent Claim
100 words
The ink set according to Claim 1, wherein the black pigment ink is a black pigment ink obtained by subjecting a black pigment having a neutral or alkaline pH to a dispersion treatment using a water-soluble polymer made of at least a (meth)acrylic ester or (meth)acrylamide monomer having a tertiary amine salt or quaternary ammonium group, and the other pigment inks different in hue from the black pigment ink are pigment inks obtained by separately subjecting pigments having their corresponding hues to a dispersion treatment using an anionic polymeric dispersant having a carboxylic or sulfonic group as a hydrophilic group.
Claim 3
Dependent Claim
35 words
The ink set according to Claim 1, wherein the interfacial tension of the black ink against plain paper is higher than those of the other pigment inks different in hue from the black pigment ink.
Claim 4
Dependent Claim
36 words
The ink set according to Claim 1, wherein the penetration rate of the black ink into the plain paper is lower than those of the other pigment inks different in hue from the black pigment ink.
Claim 5
Dependent Claim
69 words
An ink-jet color recording method comprising using 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.
Claim 6
Dependent Claim
102 words
The ink-jet color recording method according to Claim 5, wherein the black pigment ink is a black pigment ink obtained by subjecting a black pigment having a neutral or alkaline pH to a dispersion treatment using a water-soluble polymer made of at least a (meth)acrylic ester or (meth)acrylamide monomer having a tertiary amine salt or quaternary ammonium group, and the other pigment inks different in hue from the black pigment ink are pigment inks obtained by separately subjecting pigments having their corresponding hues to a dispersion treatment using an anionic polymeric dispersant having a carboxylic or sulfonic group as a hydrophilic group.
Claim 7
Dependent Claim
37 words
The ink-jet color recording method according to Claim 5, wherein the interfacial tension of the black ink against plain paper is higher than those of the other pigment inks different in hue from the black pigment ink.
Claim 8
Dependent Claim
38 words
The ink-jet color recording method according to Claim 5, wherein the penetration rate of the black ink into the plain paper is lower than those of the other pigment inks different in hue from the black pigment ink.
References Cited (Backward Citations)
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