IR transparent cyan inkjet ink
AssigneeE. I. Du Pont de Nemours and Company
InventorChristian Jackson
Life of this patent
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Abstract
The present invention pertains to a cyan dye-based inkjet ink having substantially no absorption in the near-infrared region of the spectrum (near-IR transparent). The invention further pertains to a dye-based inkjet ink set comprising this near-IR transparent cyan ink.
Claims12
A cyan inkjet ink having hue angle of between about 180 and 250, comprising a vehicle and soluble colorant, wherein the colorant comprises a first dye selected from the group consisting of Reactive Blue 49, Reactive Blue 19, Reactive Blue 72, Reactive Blue 21, Acid Blue 83, Acid Blue 260 and mixtures thereof;
- and a second dye selected from the group consisting of Direct Yellow 86, Direct Yellow 132, Acid Yellow 23, Reactive Green 12 and mixtures thereof.
An inkjet ink set comprising at least three colored visible inks, wherein the at least three colored visible inks comprise a first ink cyan in color, a second ink magenta in color and a third ink yellow in color, wherein each of the first, second and third inks individually comprises a vehicle and a soluble colorant, wherein the first ink is a cyan ink having a hue angle of between about 180 and 250, comprising a vehicle and soluble colorant, wherein the colorant comprises a first blue dye and a second dye selected from the group consisting of a yellow dye, a green dye and mixtures thereof, and wherein the visible inks of the ink set are substantially transparent in the near-infrared region.
A method for ink jet printing onto a substrate, comprising the steps of:
- (a) providing an ink jet printer that is responsive to digital data signals;
- (b) loading the printer with a substrate to be printed;
- (c) loading the printer with an ink set;
- and
- (d) printing onto the substrate using the ink set in response to the digital data signals,
- wherein the ink set comprises at least three colored visible inks, wherein the at least three colored visible inks comprise a first ink cyan in color, a second ink magenta in color and a third ink yellow in color, wherein each of the first second and third inks individually comprises a vehicle and a soluble colorant, wherein the first ink is a cyan ink having a hue angle of between about 180 and 250, comprising a vehicle and soluble colorant, wherein the colorant comprises a first blue dye and a second dye selected from the group consisting of a yellow dye, a green dye and mixtures thereof, and wherein the visible inks of the ink set are substantially transparent in the near-infrared region.
Dependencies are inferred from the claim text.