Patent US1549456A successfully refreshed from Google Patents.
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Cyan ink, ink set, set of ink and reaction liquid, and image forming method
Assignee: Canon Inc
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Filing: 2005-12-22
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Granted: 2008-03-25
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Expires: 2025-12-22
Abstract
Abstract Provided is a cyan ink applicable to an ink set having four kinds of aqueous inks composed of the cyan ink, a magenta ink, a yellow ink, and a black ink each containing water; a water-insoluble coloring material; and plurality of water-soluble organic solvents including a good medium or good mediums for the water-insoluble coloring material and a poor medium or poor mediums for the water-insoluble coloring material. The content of the water-insoluble coloring material in the cyan ink is in a specific range, and the ratio B 1 /A 1 between the good medium and the poor medium is also in a specific range. A water-soluble organic solvent showing the maximum Ka value out of respective Ka values of the plurality of water-soluble organic solvents is the poor medium. The ratio A/B between the good medium and the poor medium in an arbitrary aqueous ink in the ink set except the cyan ink and B 1 /A 1 satisfy a specific relationship. The cyan ink provides an image having a sufficiently large area factor even with a small amount of ink droplets, and having a high image density, and is excellent in storage stability and bronzing resistance.
Inventors
- 👤 Yasuhiro Nito
- 👤 Mikio Sanada
- 👤 Sadayuki Sugama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:45
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40; C09D11/54
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
230 words
An ink set having four kinds of aqueous inks composed of the cyan ink, a magenta ink, a yellow ink, and a black ink, each ink comprising at least (a) water; (b) a water-insoluble coloring material; and (c) plurality of water-soluble organic solvents including (1) a good medium or good mediums for the water-insoluble coloring material and (2) a poor medium or poor mediums for the water-insoluble coloring material, wherein in the cyan ink, the ratio B 1 /A 1 is 0.5 or more and 3.0 or less, when A 1 denotes the total content (mass %) of the good medium in the cyan ink and B 1 denotes the total content (mass %) of the poor medium in the cyan ink; and wherein in the cyan ink, a water-soluble organic solvent showing a maximum Ka value out of respective Ka values of the plurality of water-soluble organic solvents as each determined by the Bristow method is the poor medium; and wherein for each aqueous ink in the ink set other than the cyan ink, the ratio B/A satisfies the following expression (I), when A denotes the total content (mass %) of the good medium or good mediums in the aqueous ink and B denotes the total content (mass %) of the poor medium or poor mediums in the aqueous ink: ( B 1 /A 1 )/( B/A )>1 (I).
Claim 2
Dependent Claim
230 words
An ink set having four kinds of aqueous inks composed of the cyan ink, a magenta ink, a yellow ink, and a black ink, each ink comprising at least (a) water; (b) a water-insoluble coloring material; and (c) plurality of water-soluble organic solvents including (1) a good medium or good mediums for the water-insoluble coloring material and (2) a poor medium or poor mediums for the water-insoluble coloring material, wherein in the cyan ink, the ratio B 1 /A 1 is 0.5 or more and 3.0 or less, when A 1 denotes the total content (mass %) of the good medium in the cyan ink and B 1 denotes the total content (mass %) of the poor medium in the cyan ink; and wherein in the cyan ink, a water-soluble organic solvent showing a maximum Ka value out of respective Ka values of the plurality of water-soluble organic solvents as each determined by the Bristow method is the poor medium; and wherein for each aqueous ink in the ink set other than the cyan ink, the ratio B/A satisfies the following expression (I), when A denotes the total content (mass %) of the good medium or good mediums in the aqueous ink and B denotes the total content (mass %) of the poor medium or poor mediums in the aqueous ink: ( B 1 /A 1 )/( B/A )>1 (I).
Claim 3
Dependent Claim
24 words
An ink set according to claim 1 , wherein the following expression (I′) is satisfied, ( B 1 /A 1 )/( B/A )≧1.8 (I′).
Claim 4
Dependent Claim
36 words
An ink set according to claim 1 , wherein the content (mass %) of the poor medium in the cyan ink is 4 mass % or more based on the total mass of the cyan ink.
Claim 5
Dependent Claim
66 words
A set of an ink and a reaction liquid, wherein the ink comprises at least one kind of aqueous ink in the ink set according to claim 1 ; and wherein the reaction liquid is capable of making the state of dispersion of a water-insoluble coloring material in the at least one kind of aqueous ink in the ink set upon contact with the aqueous ink.
Claim 6
Dependent Claim
56 words
An image forming method using the set of an ink and a reaction liquid according to claim 4 , comprising the steps of: (i) applying the reaction liquid to a recording medium; and (ii) applying at least one aqueous ink in the ink set to the recording medium to which the reaction liquid has been fixed.
Claim 7
Dependent Claim
32 words
An image forming method comprising applying the black ink and at least one color ink in the ink set according to claim 1 on a recording medium by an ink-jet recording method.
Claim 8
Dependent Claim
24 words
An image forming apparatus comprising the ink set according to claim 1 and a recording head for ejecting the inks of the ink set.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2011-03-25 | 2011-09-24 | 2012-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2015-03-25 | 2015-09-24 | 2016-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2019-03-25 | 2019-09-24 | 2020-03-25 | $7700.00 | Window Closed / Lapsed |