EP0778321A2
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Ink set for ink jet recording and ink jet recording method using the same
Assignee: Seiko Epson Corp
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Filing: 1996-12-06
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Granted: —
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Expires: 2016-12-06
Abstract
Abstract A cyan ink, for ink jet recording, capable of realizing good lightfastness and waterfastness and, in addition, capable of realizing a good image, especially an image having good hue, and an ink set comprising the above cyan ink in combination with a magenta ink and a yellow ink are provided. The use of a combination of C.I. Pigment Blue 60, 22, 64, or 21 with C.I. Pigment Blue 15 : 3 as a cyan ink enables the formation of a good image. An ink set comprising this cyan ink composition in combination with a yellow ink comprising C.I. Pigment Yellow 109 and C.I. Pigment Yellow 110 and a magenta ink comprising C.I. Pigment Red 122 or C.I. Pigment Red 209 can realize a good image.
Inventors
- 👤 Kazuhide Kubota
- 👤 Kiyohiko Takemoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 21:05
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/40; C09D11/54
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
56 words
A cyan ink composition for ink jet recording,
comprising at least one pigment represented by the
following formula (I): wherein x is in integer of 0 to 3; or, a pigment represented by the following formula (II): or a mixture of the pigment represented by the formula (I)
with the pigment represented by the formula (II).
Claim 2
Dependent Claim
25 words
The cyan ink composition according to claim 1,
wherein the pigment represented by the formula (I) is C.I.
Pigment Blue 60, 22, 64, or 21.
Claim 3
Dependent Claim
25 words
The cyan ink composition according to claim 1 or
2, wherein the pigment represented by the formula (II) is
C.I. Pigment Blue 15 : 3.
Claim 4
Dependent Claim
41 words
The cyan ink composition according to any one of
claims 1 to 3, wherein the weight ratio of the pigment
represented by the formula (I) to the pigment represented
by the formula (II) is 1 : 2 to 1 : 10.
Claim 5
Dependent Claim
19 words
The cyan ink composition according to any one of
claims 1 to 4, which further comprises a resin emulsion.
Claim 6
Dependent Claim
46 words
A yellow ink composition for ink jet recording,
comprising a pigment represented by the following formula
(III): wherein Y 1 to Y 8 each independently represent a chlorine or
hydrogen atom and R represents o-phenylene or 2,6-xylyl,
or C.I. Pigment Yellow 74, 138, 150 or 180.
Claim 7
Dependent Claim
27 words
The yellow ink composition according to claim 6,
which comprises C.I. Pigment Yellow 109 and C.I. Pigment
Yellow 110 as the pigment represented by the formula (III).
Claim 8
Dependent Claim
30 words
The yellow ink composition according to claim 7,
wherein the weight ratio of C.I. Pigment Yellow 109 to C.I.
Pigment Yellow 110 is 60 : 40 to 99 : 1.
Claim 9
Dependent Claim
19 words
The yellow ink composition according to any one of
claims 6 to 8, which further comprises a resin emulsion.
Claim 10
Dependent Claim
36 words
An ink set for ink jet recording, comprising a
cyan ink composition, a magenta ink composition, and a
yellow ink composition, the cyan ink composition being one
according to any one of claims 1 to 5.
Claim 11
Dependent Claim
36 words
An ink set for ink jet recording, comprising a
cyan ink composition, a magenta ink composition, and a
yellow ink composition, the yellow ink composition being
one according to any one of claims 6 to 9.
Claim 12
Dependent Claim
51 words
An ink set for ink jet recording, comprising a
cyan ink composition, a magenta ink composition, and a
yellow ink composition, the cyan ink composition being one
according to any one of claims 1 to 5, the yellow ink
composition being one according to any one of claims 6 to
9.
Claim 13
Dependent Claim
45 words
The ink set, according to claim 10, 11, or 12,
wherein the magenta ink composition comprises, as a
colorant, a pigment represented by the following formula
(IV): wherein X 1 to X 10 each independently represent a hydrogen
or chlorine atom or a methyl group.
Claim 14
Dependent Claim
30 words
The ink set according to claim 13, wherein the
pigment represented by the formula (IV) in the magenta ink
composition is C.I. Pigment Red 122 or C.I. Pigment Red
209.
Claim 15
Dependent Claim
22 words
The ink set according to claim 14, wherein the
cyan ink composition comprises C.I. Pigment Blue 60 or C.I.
Pigment Blue 15:3.
Claim 16
Dependent Claim
22 words
The ink set according to any one of claims 13 to
15, wherein the magenta ink composition further comprises
a resin emulsion.
Claim 17
Dependent Claim
51 words
The ink set according to any one of claims 10 to
16, wherein the concentration of the magenta pigment in the
magenta ink composition and the concentration of the yellow
pigment in the yellow ink composition each are higher than
the concentration of the cyan pigment in the cyan ink
composition.
Claim 18
Dependent Claim
72 words
The ink set according to claim 17, wherein the
pigment concentration is not more than 6% by weight for all
the ink compositions and the ratio of the pigment
concentration (% by weight) of the cyan ink composition to
the pigment concentration (% by weight) of the magenta ink
composition to the pigment concentration (% by weight) of
the yellow ink composition is 1 : 1 to 2 : 1 to 3.
Claim 19
Independent Claim
62 words
A method for ink jet recording, comprising the
step of: depositing a reaction solution containing a
reactant and an ink composition onto a recording medium to
conduct printing, wherein the ink composition is the cyan ink
composition according to any one of claims 1 to 5, and the reactant breaks the state of dispersion and/or
dissolution of the pigment to cause agglomeration.
Claim 20
Independent Claim
59 words
A method for ink jet recording, comprising the
step of: depositing a reaction solution containing a
reactant and an ink composition onto a recording medium, wherein the ink composition is the yellow ink
composition according to any one of claims 6 to 9, and the reactant breaks the state of dispersion and/or
dissolution of the pigment to cause agglomeration.
Claim 21
Independent Claim
60 words
A method for ink jet recording, comprising the
step of: depositing a reaction solution containing a
reactant and an ink composition onto a recording medium, wherein the ink composition is one in the ink set
according to any one of claims 10 to 18, and the reactant breaks the state of dispersion and/or
dissolution of the pigment to cause agglomeration.
Claim 22
Independent Claim
43 words
The method according to any one of claims 19 to
21, wherein the step of ejecting droplets of the ink
composition onto the recording medium to record an image
is performed after the step of depositing the reaction
solution onto the recording medium.
Claim 23
Independent Claim
43 words
The method according to any one of claims 19 to
21, wherein the step of ejecting droplets of the ink
composition onto the recording medium to record an image
is performed before the step of depositing the reaction
solution onto the recording medium.
Claim 24
Independent Claim
21 words
The method according to any one of claims 19 to
23, wherein the reactant is a polyvalent metal salt and/or
polyallylamine.
Claim 25
Dependent Claim
24 words
The method according to claim 24, wherein the
polyvalent metal salt is a salt of nitric acid or a salt
of a carboxylic acid.
Claim 26
Dependent Claim
15 words
A record printed by the method according to any
one of claims 19 to 25.
References Cited (Backward Citations)
JPS621426B2
Cited
JPH0356573A
Cited
JPH0379678A
Cited
JPH0379680A
Cited
JPH03160068A
Cited
JPH03252467A
Cited
JPH0418462A
Cited
JPH05202328A
Cited
EP0635380A1
Cited
JPH06106735A
Cited
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