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US 8,007,578 B2Granted
Pigmented ink having infrared absorption and low visible color
AssigneeHewlett-Packard Development Company, L.P.
InventorJayprakash C. Bhatt
Life of this patent
Estimating the term…
Abstract
An ink having infrared (IR) absorptivity includes an ink vehicle and an IR absorptive pigment having low visible color. According to one exemplary embodiment, the IR absorptive pigment includes an antimony-containing tin oxide.
Claims14
An ink having infrared (IR) absorptivity comprising:
- an IR absorptive pigment having low visible color and having an IR absorbance of between approximately 10 and 60% for light having a wavelength of between approximately 700 and 1000 nm, an IR absorbance of between approximately 20 and 88% for light having a wavelength of between approximately 1000 and 1500 nm, and an IR absorbance of between approximately 20 and 95% for light having a wavelength of between approximately 1500 and 2500 nm;
- a liquid ink vehicle;
- and
- a pigment configured to match a color of a selected substrate on which said ink is to be used.
1 more element
A method of making an IR absorptive ink comprising:
- identifying a substrate;
- providing liquid ink vehicle;
- dispersing an IR absorptive pigment having a low visible color in said liquid ink vehicle;
- and
- adding a colored dye or pigment to said vehicle, wherein said colored dye or pigment is configured to modify a color of said ink to match a color of a selected the identified substrate on which said ink will be used.
2 more elements
Dependencies are inferred from the claim text.