Patent WO1991002494A1 successfully refreshed from Google Patents.
US20070046752A1
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Water-based ink set for ink-jet recording and ink-jet recording method
Assignee: Brother Industries Ltd
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Filing: 2006-07-21
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Granted: —
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Expires: 2026-07-21
Abstract
Abstract A water-based ink set for ink-jet recording is provided which is capable of: reducing graininess in a low-density printed part without reducing the color reproduction range in red and magenta directions in a high-density printed part; extending the color reproduction range in the red direction; improving the vividness of the red color; and improving the light fastness and gas resistance. The water-based ink set for ink-jet recording includes a magenta dye ink and a red pigment ink. The magenta dye ink is a light magenta dye ink having a lightness (L*) of about 50 or more in the L*a*b* calorimetric system.
Inventors
- 👤 Tomoyo Hamajima
- 👤 Narumi Kawai
- 👤 Narumi Koga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:07
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
56 words
1 . A water-based ink set for ink-jet recording comprising a magenta dye ink employing dye as a coloring agent and a red pigment ink employing pigment as a coloring agent, wherein the magenta dye ink is a light magenta dye ink having a lightness (L*) of about 50 or more in the L*a*b* colorimetric system.
Claim 2
Dependent Claim
56 words
1 . A water-based ink set for ink-jet recording comprising a magenta dye ink employing dye as a coloring agent and a red pigment ink employing pigment as a coloring agent, wherein the magenta dye ink is a light magenta dye ink having a lightness (L*) of about 50 or more in the L*a*b* colorimetric system.
Claim 3
Dependent Claim
41 words
2 . The water-based ink set for ink-jet recording according to claim 1 , wherein a normal magenta ink having a lightness (L*) of less than about 50 in the L*a*b* colorimetric system is not included as the magenta dye ink.
Claim 4
Dependent Claim
39 words
3 . The water-based ink set for ink-jet recording according to claim 1 , wherein the light magenta dye ink has the lightness (L*) in a range of from about 50 to about 65 in the L*a*b* calorimetric system.
Claim 5
Dependent Claim
47 words
4 . The water-based ink set for ink-jet recording according to claim 1 , wherein the light magenta dye ink has a hue angle (h) in ranges of from about 335° to about 360° or of from about 0° to about 5° in the L*a*b* colorimetric system.
Claim 6
Dependent Claim
39 words
5 . The water-based ink set for ink-jet recording according to claim 1 , wherein the light magenta dye ink has a chroma (C*) in a range of from about 80 to about 90 in the L*a*b* colorimetric system.
Claim 7
Dependent Claim
33 words
6 . The water-based ink set for ink-jet recording according to claim 1 , wherein the red pigment ink has a lightness (L*) of about 50 or less in the L*a*b* calorimetric system.
Claim 8
Dependent Claim
38 words
7 . The water-based ink set for ink-jet recording according to claim 1 , wherein the red pigment ink has a lightness (L*) in a range of from about 25 to about 50 in the L*a*b* calorimetric system.
Claim 9
Dependent Claim
39 words
8 . The water-based ink set for ink-jet recording according to claim 1 , wherein the red pigment ink has a hue angle (h) in a range of from about 20° to about 35° in the L*a*b* calorimetric system.
Claim 10
Dependent Claim
38 words
9 . The water-based ink set for ink-jet recording according to claim 1 , wherein the red pigment ink has a chroma (C*) in a range of from about 65 to about 90 in the L*a*b* calorimetric system.
Claim 11
Dependent Claim
23 words
10 . The water-based ink set for ink-jet recording according to claim 1 , further comprising a yellow ink and/or a cyan ink.
Claim 12
Dependent Claim
19 words
11 . The water-based ink set for ink-jet recording according to claim 1 , further comprising a black ink.
Claim 13
Dependent Claim
18 words
12 . An ink-jet recording method employing the water-based ink set for ink-jet recording according to claim 1.
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