Patent US2465976A successfully refreshed from Google Patents.
US5772742A
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Dye set for improved color quality for ink-jet printers
Assignee: Hewlett Packard Development Co LP
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Filing: 1997-05-06
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Granted: 1998-06-30
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Expires: 2017-05-06
Abstract
Abstract In accordance with the invention inks suitable for use in ink-jet printers and method for formulating the same are provided. The present dye set exhibits excellent color quality and lightfastness across a range of media. Furthermore, the dye set preserves its performance over a wide pH range, particularly low pH. This functionality across a wide pH range, enables the use of pH- sensitive bleed control mechanisms. More specifically, a specific dye set for formulating the yellow, magenta, and cyan inks is disclosed, comprising Direct Yellow 132 and Acid Yellow 23; Magenta 377 and Acid Red 52; and Direct Blue 199 and Acid Blue 9; respectively.
Inventors
- 👤 Patricia A. Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:36
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/40; C09D11/32; C09D11/328; C09D11/38
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
161 words
An ink set for ink-jet printing, comprising: a yellow ink comprising at least one yellow dye, said yellow ink having, on plain paper, a hue angle in the range from about 90 to about 100, a chroma greater than about 79, and a one-year simulated lightfade less than about 25; a magenta ink comprising at least one magenta dye, said magenta ink having, on plain paper, a hue angle in the range from about 343 to about 352, a chroma greater than about 60, and a one-year simulated lightfade less than about 30; and a cyan ink comprising at least one cyan dye, said cyan ink having, on plain paper, a hue angle in the range from about 230 to about 238, a chroma greater than about 42, and a one-year simulated lightfade less than about 15; said yellow, magenta, and cyan dyes being soluble in an aqueous vehicle having a pH in the range from about 2 to about 6.
Claim 2
Dependent Claim
161 words
An ink set for ink-jet printing, comprising: a yellow ink comprising at least one yellow dye, said yellow ink having, on plain paper, a hue angle in the range from about 90 to about 100, a chroma greater than about 79, and a one-year simulated lightfade less than about 25; a magenta ink comprising at least one magenta dye, said magenta ink having, on plain paper, a hue angle in the range from about 343 to about 352, a chroma greater than about 60, and a one-year simulated lightfade less than about 30; and a cyan ink comprising at least one cyan dye, said cyan ink having, on plain paper, a hue angle in the range from about 230 to about 238, a chroma greater than about 42, and a one-year simulated lightfade less than about 15; said yellow, magenta, and cyan dyes being soluble in an aqueous vehicle having a pH in the range from about 2 to about 6.
Claim 3
Dependent Claim
56 words
The ink set of claim 1 wherein the yellow ink has a hue angle in the range from about 93 to about 97; the magenta ink has a hue angle in the range from about 345 to about 350; and the cyan ink has a hue angle in the range from about 232 to about 236.
Claim 4
Dependent Claim
43 words
An ink set for ink-jet printing, comprising: a yellow ink comprising Direct Yellow 132 and Acid Yellow 23 dyes; a magenta ink comprising Magenta 377 and Acid Red 52 dyes; and a cyan ink comprising Direct Blue 199 and Acid Blue 9 dyes.
Claim 5
Dependent Claim
43 words
An ink set for ink-jet printing, comprising: a yellow ink comprising Direct Yellow 132 and Acid Yellow 23 dyes; a magenta ink comprising Magenta 377 and Acid Red 52 dyes; and a cyan ink comprising Direct Blue 199 and Acid Blue 9 dyes.
Claim 6
Dependent Claim
23 words
The ink set of claim 3 wherein the total dye concentration in each ink ranges from about 0.1 to about 7 wt. %.
Claim 7
Dependent Claim
23 words
The ink set of claim 3 wherein the total dye concentration in each ink ranges from about 0.1 to about 4 wt. %.
Claim 8
Dependent Claim
88 words
The ink set of claim 3 wherein the yellow ink comprises from about 1 to about 2.1 wt. % Direct Yellow 132 and from about 1 to about 2.5 wt. % Acid Yellow 23; the magenta ink comprises from about 1.9 to about 3.4 wt. % Magenta 377 and from about 0.8 to about 1.4 wt. % Acid Red 52; and the cyan ink comprises from about 1.1 to about 2.2 wt. % Direct Blue 199 and from about 0.6 to about 1.3 wt. % Acid Blue 9.
Claim 9
Dependent Claim
53 words
The ink set of claim 3 wherein the Direct Yellow 132 is associated with sodium and Acid Yellow 23 is associated with tetramethylammonium; Magenta 377 is associated with sodium and Acid Red 52 is associated with lithium; and Direct Blue 199 is associated with tetramethylammonium and Acid Blue 9 is associated with sodium.
Claim 10
Dependent Claim
21 words
The ink set of claim 3 wherein the pH for each ink is in range from about 2 to about 6.
Claim 11
Dependent Claim
21 words
The ink set of claim 8 wherein the pH for each ink is in range from about 3 to about 5.
Claim 12
Dependent Claim
21 words
The ink set of claim 9 wherein the pH for each ink is in range from about 3.5 to about 4.5.
Claim 13
Dependent Claim
14 words
The ink set of claim 3 wherein each ink further comprises an organic acid.
Claim 14
Dependent Claim
24 words
The ink set of claim 11 wherein the organic acid is selected from the group consisting of glycolic, succinic, citric acid, and mixtures thereof.
Claim 15
Dependent Claim
24 words
The ink set of claim 11 wherein the organic acid is present in a concentration ranging from about 0.1 to about 20 wt. %.
Claim 16
Dependent Claim
24 words
The ink set of claim 13 wherein the organic acid is present in a concentration ranging from about 0.5 to about 8 wt. %.
Claim 17
Independent Claim
60 words
A method for printing using an ink-jet printer, comprising printing from a set of ink-jet inks onto a printing medium, said ink set comprising: a yellow ink comprising Direct Yellow 132 and Acid Yellow 23 dyes; a magenta ink comprising Magenta 377 and Acid Red 52 dyes; and a cyan ink comprising Direct Blue 199 and Acid Blue 9 dyes.
Claim 18
Independent Claim
60 words
A method for printing using an ink-jet printer, comprising printing from a set of ink-jet inks onto a printing medium, said ink set comprising: a yellow ink comprising Direct Yellow 132 and Acid Yellow 23 dyes; a magenta ink comprising Magenta 377 and Acid Red 52 dyes; and a cyan ink comprising Direct Blue 199 and Acid Blue 9 dyes.
Claim 19
Dependent Claim
22 words
The method of claim 15 wherein the total dye concentration in each ink ranges from about 0.1 to about 7 wt. %.
Claim 20
Dependent Claim
20 words
The method of claim 15 wherein the pH for each ink is in range from about 2 to about 6.
Claim 21
Dependent Claim
13 words
The method of claim 17 wherein each ink further comprises an organic acid.
Claim 22
Independent Claim
118 words
A method for printing using an ink-jet printer, comprising printing from a set of ink-jet inks onto a printing medium, wherein on plain paper: the yellow ink has a hue angle in the range from about 90 to about 100, a chroma greater than about 79, and a one-year simulated lightfade less than about 25; the magenta ink has a hue angle in the range from about 343 to about 352, a chroma greater than about 60, and a one-year simulated lightfade less than about 30; and the cyan ink has a hue angle in the range from about 230 to about 238, a chroma greater than about 42, and a one-year simulated lightfade less than about 15.
Claim 23
Independent Claim
118 words
A method for printing using an ink-jet printer, comprising printing from a set of ink-jet inks onto a printing medium, wherein on plain paper: the yellow ink has a hue angle in the range from about 90 to about 100, a chroma greater than about 79, and a one-year simulated lightfade less than about 25; the magenta ink has a hue angle in the range from about 343 to about 352, a chroma greater than about 60, and a one-year simulated lightfade less than about 30; and the cyan ink has a hue angle in the range from about 230 to about 238, a chroma greater than about 42, and a one-year simulated lightfade less than about 15.
References Cited (Backward Citations)
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