EP0675178A2
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EP
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Ink set, and method and apparatus for image formation employing the same
Assignee: Canon Inc
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Filing: 1995-03-29
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Granted: —
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Expires: 2015-03-29
Abstract
Abstract Provided is an ink set comprising a liquid composition containing a cationic substance, and a black ink in combination, the black ink containing a black dye, and a cyan dye and/or a yellow dye as water-soluble anionic dyes.
Inventors
- 👤 Yutaka C/O Canon K.K. Kurabayashi
- 👤 Katsuhiro C/O Canon K.K. Shirota
- 👤 Katsuhiko C/O Canon K.K. Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 04:56
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
36 words
An ink set comprising a liquid composition containing a cationic substance, and a black ink in combination, the black ink containing a black dye, and a cyan dye and/or a yellow dye as water-soluble anionic dyes.
Claim 2
Dependent Claim
22 words
The ink set according to claim 1, wherein the anionic dye is any one of acid dyes, direct dyes, and reactive dyes.
Claim 3
Dependent Claim
32 words
The ink set according to claim 1, wherein the black ink contains the anionic dye at a content of from 0.1 to 15 % by weight based on the entire black ink.
Claim 4
Dependent Claim
38 words
The ink set according to claim 1, wherein the black ink contains the cyan dye and/or a yellow dye at a content of 0.1 to 50 % by weight based on the total weight of the black dye.
Claim 5
Dependent Claim
38 words
The ink set according to claim 1, wherein the black ink contains the cyan dye and/or a yellow dye at a content of 0.5 to 40 % by weight based on the total weight of the black dye.
Claim 6
Dependent Claim
25 words
The ink set according to claim 1, wherein the cationic substance in the liquid composition comprises a lower-molecular cationic substance and a higher-molecular cationic substance.
Claim 7
Dependent Claim
44 words
The ink set according to claim 1, wherein the cationic substance in the liquid composition comprises a lower-molecular cationic substance of a molecular weight of not higher than 1000 and a higher-molecular weight cationic substance of a molecular weight of not lower than 1500.
Claim 8
Dependent Claim
20 words
The ink set according to claim 6, the lower-molecular cationic substance has a molecular weight ranging from 100 to 700.
Claim 9
Dependent Claim
21 words
The ink set according to claim 6, wherein the higher-molecular cationic substance has a molecular weight ranging from 1,500 to 10,000.
Claim 10
Dependent Claim
19 words
The ink set according to claim 1, wherein the black ink further comprises water and a water-soluble organic solvent.
Claim 11
Dependent Claim
19 words
The ink set according to claim 1, wherein the liquid composition further comprises water and a water-soluble organic solvent.
Claim 12
Dependent Claim
31 words
The ink set according to claim 1, wherein the ink contains water at a content of from 10 to 97.5 % by weight based on the total weight of the ink.
Claim 13
Dependent Claim
33 words
The ink set according to claim 1, wherein the ink contains an organic solvent at a content of from 2 to 80 % by weight based on the total weight of the ink.
Claim 14
Dependent Claim
21 words
The ink set according to claim 1, wherein the ink has a viscosity ranging from 1 to 20 cP at 25°C.
Claim 15
Dependent Claim
20 words
The ink set according to claim 1, wherein the ink has a surface tension of not lower than 25 dyn/cm.
Claim 16
Dependent Claim
18 words
The ink set according to claim 1, wherein the ink has a pH ranging from 6 to 10.
Claim 17
Dependent Claim
22 words
The ink set according to claim 1, wherein any of a yellow ink, a magenta ink, and a cyan ink is combined.
Claim 18
Dependent Claim
42 words
An image-forming method employing a liquid composition containing a cationic substance, and a black ink combindly for forming a black color portion, the black ink containing a black dye, and a cyan dye and/or a yellow dye as water soluble anionic dyes.
Claim 19
Independent Claim
49 words
A method for mitigating a bronzing phenomenon in image formation, employing a liquid composition containing a cationic substance, and a black ink combindly for forming a black color portion, the black ink containing a black dye, and a cyan dye and/or a yellow dye as water soluble anionic dyes.
Claim 20
Dependent Claim
40 words
An image-forming method by forming a black image portion by applying a liquid composition and a black ink on a recording medium by an ink-jet system, which employs an ink set as stated in any of claims 1 to 17.
Claim 21
Dependent Claim
27 words
The image-forming method according to claim 20, wherein the ink-jet system is a system to eject ink droplets by action of thermal energy applied to the ink.
Claim 22
Dependent Claim
43 words
A recording unit comprising containers for a liquid composition and a black ink, and a head for ejecting the liquid composition and the black ink as droplets, the recording unit employing an ink set as stated in any of claims 1 to 17.
Claim 23
Dependent Claim
24 words
The recording unit according to claim 22, wherein an ink-jet system to eject droplets by action of thermal energy is applied to the head.
Claim 24
Dependent Claim
26 words
An ink cartridge comprising containers for a liquid composition and a black ink, employing an ink set as stated in any of claims 1 to 17.
Claim 25
Dependent Claim
16 words
An ink-jet recording apparatus, provided with a recording unit as stated in claim 22 or 23.
Claim 26
Dependent Claim
13 words
An ink-jet recording apparatus, having the ink cartridge as stated in claim 24.
Claim 27
Dependent Claim
20 words
The ink-jet recording apparatus according to claim 26, having a recording head which ejects ink droplets by an ink-jet system.
Claim 28
Dependent Claim
18 words
An ink-jet recording apparatus, provided with an ink as set stated in any of claims 1 to 17.
Claim 29
Dependent Claim
23 words
The ink-jet recording apparatus according to claim 28, which is further provided with a head which ejects ink droplets by an ink-jet system.
Claim 30
Dependent Claim
43 words
An image, comprising a black portion formed by combined use of a liquid composition containing a cationic substance, and a black ink, the black ink containing a black dye, and a cyan dye and/or a yellow dye as water-soluble anionic dyes in combination.
Claim 31
Dependent Claim
17 words
Use of the ink set as stated in any of claims 1 to 17 for image formation.
Claim 32
Dependent Claim
17 words
Use of the ink set as stated in any of claims 1 to 17 for ink-jet recording.
Claim 33
Dependent Claim
18 words
Use of the ink set as stated in any of claims 1 to 17 for black image formation.
References Cited (Backward Citations)
No citation records indexed.
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