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.
Claims17
A cyan inkjet 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 cyan ink is substantially transparent in the near-infrared region.
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;
- and
- (d) printing onto the substrate using the ink set in response to the digital data signals,
- wherein the ink is a cyan inkjet 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 cyan ink is substantially transparent in the near-infrared region.
Dependencies are inferred from the claim text.