EP0712913A1
Expired / Lapsed
EP
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Ink-jet color recording process and ink set therefor
Assignee: Canon Inc
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Filing: 1995-11-16
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Granted: —
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Expires: 2015-11-16
Abstract
Abstract Provided is an ink-jet color recording process to form color images on a recording medium by an ink-jet system applying a plurality of colored pigment-based inks, wherein each of said colored pigment inks comprises a pigment dispersant, and a pigment dispersant contained in at least one of colored pigment-based inks is different from a pigment dispersant contained in the remaining colored pigment-based inks.
Inventors
- 👤 Shinichi C/O Canon Kabushiki Kaisha Tochihara
- 👤 Masami C/O Canon Kabushiki Kaisha Ikeda
- 👤 Tadayoshi C/O Canon Kabushiki Kaisha Inamoto
- 👤 Kiyomi C/O Canon Kabushiki Kaisha Aono
- 👤 Hiromichi C/O Canon Kabushiki Kaisha Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 11:29
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
61 words
An ink-jet color recording process to form color images on a recording medium by an ink-jet system applying a plurality of colored pigment-based inks, wherein each of said colored pigment inks comprises a pigment dispersant, and a pigment dispersant contained in at least one of colored pigment-based inks is different from a pigment dispersant contained in the remaining colored pigment-based inks.
Claim 2
Dependent Claim
21 words
The ink-jet color recording process according to claim 1, wherein pigment-based inks of black, magenta, cyan and yellow colors are used.
Claim 3
Dependent Claim
22 words
The ink-jet color recording process according to claim 1, wherein each of said colored pigment-based inks is an aqueous pigment-based dispersion ink.
Claim 4
Dependent Claim
27 words
The ink-jet color recording process according to claim 1, wherein a pigment dispersant contained in a black ink among said colored pigment-based inks is a water-soluble resin.
Claim 5
Dependent Claim
32 words
The ink-jet color recording process according to claim 1, wherein a pigment contained in a magenta ink among said colored pigment-based inks is quinacridon and said pigment dispersant is a water-soluble surfactant.
Claim 6
Dependent Claim
31 words
The ink-jet color recording process according to claim 1, wherein a pigment in a cyan ink among said colored pigment-based inks is phthalocyanine and said pigment dispersant is a water-soluble surfactant.
Claim 7
Dependent Claim
36 words
The ink-jet color recording process according to any one of claims 5 and 6, wherein said water-soluble surfactant is selected from the group consisting of phosphate ester-type surfactants, polyoxyethylene fatty acid amides and polyoxyethylene alkyl amines.
Claim 8
Dependent Claim
37 words
The ink-jet color recording process according to claim 1, wherein said pigment dispersant is contained in an amount of from 0.1 to 10% by weight based on the total weight of each of said colored pigment-based inks.
Claim 9
Dependent Claim
37 words
The ink-jet color recording process according to claim 1, wherein said pigment dispersant is contained in an amount of from 1 to 5% by weight based on the total weight of each of said colored pigment-based inks.
Claim 10
Dependent Claim
36 words
The ink-jet color recording process according to claim 1, wherein a pigment is contained in an amount of from 1 to 20% by weight based on the total weight of each of said colored pigment-based inks.
Claim 11
Dependent Claim
24 words
The ink-jet color recording process according to claim 4, wherein said water-soluble resin has a weight average molecular weight of from 500 to 30,000.
Claim 12
Dependent Claim
24 words
The ink-jet color recording process according to claim 4, wherein said water-soluble resin has a weight average molecular weight of from 1,000 to 15,000.
Claim 13
Dependent Claim
35 words
The ink-jet color recording process according to claim 1, wherein said ink-jet system is a system in which thermal energy is applied to each of said colored pigment-based inks so as to generate ink droplets.
Claim 14
Dependent Claim
46 words
An ink set comprising a plurality of colored pigment-based inks, wherein eachof said colored pigment inks comprises a pigment dispersant, and a pigment dispersant contained in at least one of colored pigment-based inks is different from a pigment dispersant contained in the remaining colored pigment-based inks.
Claim 15
Dependent Claim
19 words
The ink set according to claim 14, wherein pigment-based inks of black, magenta, cyan and yellow colors are used.
Claim 16
Dependent Claim
20 words
The ink set according to claim 14, wherein each of said colored pigment-based inks is an aqueous pigment-based dispersion ink.
Claim 17
Dependent Claim
25 words
The ink set according to claim 14, wherein a pigment dispersant contained in a black ink among said colored pigment-based inks is a water-soluble resin.
Claim 18
Dependent Claim
30 words
The ink set according to claim 14, wherein a pigment contained in a magenta ink among said colored pigment-based inks is quinacridon and said pigment dispersant is a water-soluble surfactant.
Claim 19
Dependent Claim
29 words
The ink set according to claim 14 wherein a pigment in a cyan ink among said colored pigment-based inks is phthalocyanine and said pigment dispersant is a water-soluble surfactant.
Claim 20
Dependent Claim
34 words
The ink set according to any one of claims 18 and 19, wherein said water-soluble surfactant is selected from the group consisting of phosphate ester-type surfactants, polyoxyethylene fatty acid amides and polyoxyethylene alkyl amines.
Claim 21
Dependent Claim
35 words
The ink set according to claim 14, wherein said pigment dispersant is contained in an amount of from 0.1 to 10% by weight based on the total weight of each of said colored pigment-based inks.
Claim 22
Dependent Claim
35 words
The ink set according to claim 14, wherein said pigment dispersant is contained in an amount of from 1 to 5% by weight based on the total weight of each of said colored pigment-based inks.
Claim 23
Dependent Claim
34 words
The ink set according to claim 14, wherein a pigment is contained in an amount of from 1 to 20% by weight based on the total weight of each of said colored pigment-based inks.
Claim 24
Dependent Claim
22 words
The ink set according to claim 17, wherein said water-soluble resin has a weight average molecular weight of from 500 to 30,000.
Claim 25
Dependent Claim
22 words
The ink set according to claim 17, wherein said water-soluble resin has a weight average molecular weight of from 1,000 to 15,000.
Claim 26
Dependent Claim
19 words
Use of the ink set according to any one of claims 14 to 25 for an ink-jet recording system.
Claim 27
Dependent Claim
24 words
Use of the ink set according to any one of claims 14 to 25 for ink-jet recording system in which thermal energy is utilized.
References Cited (Backward Citations)
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