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US 7,452,415 B2Granted
Pigment-based ink sets for ink-jet printing
AssigneeHewlett-Packard Development Company, L.P.
InventorsHoward Doumaux, Katie Nifong Burns, David Mahli
Life of this patent
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Abstract
Ink systems and combinations thereof that include neutral gray or black ink and at least one other pigment with matched light fastness are disclosed. Also disclosed are methods of printing.
Claims33
An ink set for ink jet printing comprising:
- a neutral black ink comprising:
- an ink vehicle, and
- a black pigment (K), cyan pigment (C), and violet pigment (V);
- and
- a yellow ink comprising:
- an ink vehicle, and
- yellow pigment having comparable lightfastness as the neutral black ink.
4 more elements
An ink set for ink jet printing comprising:
- a neutral black ink comprising:
- an ink vehicle, and
- a blend of a black pigment (K), cyan pigment (C), and magenta pigment (M);
- and
- a yellow ink comprising:
- an ink vehicle, and
- yellow pigment having comparable lightfastness as the neutral black ink.
4 more elements
An ink set for inkjet printing comprising:
- a neutral black ink;
- and
- at least one ink selected from the group consisting of:
- neutral medium gray ink, neutral dark gray ink, neutral light gray ink, cyan ink, magenta ink, yellow ink, light cyan ink, light magenta ink, red ink, green ink, blue ink, violet ink and orange ink;
- wherein the neutral black ink comprises an ink vehicle, a black pigment (K), cyan pigment (C), and violet pigment (V);
- and
- wherein the yellow ink comprises a yellow pigment that fails at approximately the same rate or time as the black pigment.
4 more elements
An ink set for inkjet printing comprising:
- a neutral black ink;
- and
- at least one ink selected from the group consisting of:
- neutral medium gray ink, neutral dark gray ink, neutral light gray ink, cyan ink, magenta ink, yellow ink, light cyan ink, light magenta ink, red ink, green ink, blue ink, violet ink and orange ink;
- wherein the neutral black ink comprises an ink vehicle, a black pigment (K), cyan pigment (C), and magenta pigment (M);
- and
- wherein the yellow ink comprises a yellow pigment that fails at approximately the same rate as the black pigment.
4 more elements
A method of printing gray, black, neutral, and color areas with ink-jet printing comprising:
- printing on a medium with an ink set of neutral black ink, yellow ink, and at least one ink selected from the group consisting of neutral medium gray ink, neutral dark gray ink, neutral light gray ink, cyan ink, magenta ink, light cyan ink, light magenta ink, red ink, green ink, blue ink, violet ink and orange ink;
- wherein the neutral black ink comprises:
- an ink vehicle, and
- a blend of carbon black (K);
- cyan pigment (C) and a violet pigment (V) or magenta pigment (M);
- wherein the KCV blend has a composition in which C weight percent=(0.15 to 0.3)·(K weight percent) and the V weight percent=(0.1 to 0.22)·(K weight percent);
- and wherein the KCM blend has a composition in which C weight percent=(0.35 to 0.5)·(K weight percent) and M weight percent=(0.45 to 0.6)·(K weight percent);
- and
- selecting yellow pigment for the yellow ink that will have a comparable lifespan as the black pigment.
6 more elements
Dependencies are inferred from the claim text.