Fluorescent Additives For Ink
AssigneeLexmark International, Inc.
InventorXiaorong Cai
Life of this patent
Estimating the term…
Abstract
The present invention relates to a fluorescent inkjet composition. The inkjet composition includes a fluorescent dispersion including a fluorescent colorant; wherein the inkjet composition emits light at a first intensity I1 in the range of 450 nm to 700 nm upon excitation by incident light having a wavelength in the range of 250 to 400 nm. In addition, the inkjet composition is capable of emitting light at a second intensity I2 upon exposure to a temperature of 60 ° C. for 8 weeks, wherein I2=(0.50 to 1.0)*I1.
Claims27
A fluorescent inkjet composition, comprising:
- a fluorescent dispersion including a fluorescent colorant;
- wherein said inkjet composition emits light at a first intensity I1 in the range of 450 nm to 700 nm upon excitation by incident light having a wavelength in the range of 250 to 400 nm and said inkjet composition is capable of emitting light at a second intensity I2 upon exposure to a temperature of 60° C. for 8 weeks, wherein
- I2=(0.50 to 1.0)*I1.
A fluorescent inkjet composition, comprising:
- an aqueous dispersion including a fluorescent colorant;
- wherein said inkjet composition emits light at a first intensity I1 in the range of 450 nm to 700 nm upon excitation by incident light having a wavelength in the range of 250 to 400 nm and said inkjet composition is capable of emitting light at a second intensity I2 for a period of one year at temperatures of 18° C. to 28° C., wherein
- I2=(0.50 to 1.0)*I1.
A method of providing a fluorescent inkjet composition, comprising:
- combining a fluorescent dispersion including a fluorescent colorant with an inkjet composition;
- and
- wherein said inkjet composition emits light at a first intensity I1 in the range of 450 nm to 700 nm upon excitation by incident light having a wavelength in the range of 250 to 400 nm and said inkjet composition is capable of emitting light at a second intensity I2 upon exposure to a temperature of 60° C. for 8 weeks, wherein
- I2=(0.50 to 1.0)*I1.
Dependencies are inferred from the claim text.