SECURITY TONER AND PROCESS OF USING THEREOF
First Claim
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1. An emulsion aggregation toner having toner particles comprising a core and a shell, wherein the core comprisesan IR-taggant selected from the group consisting of an inorganic ceramic nanoparticle, an IR-emitting organic dye, and an IR-emitting quantum dot;
- wherein the IR-taggant has an emission peak in the wavelength range of about 800 to 1600 nm;
a crystalline polyester resin; and
an amorphous polyester resin.
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Abstract
The present disclosure relates to toner compositions containing an IR-taggant, and method of making thereof. The disclosure also relates to method for confirming authenticity of an item.
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Citations
20 Claims
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1. An emulsion aggregation toner having toner particles comprising a core and a shell, wherein the core comprises
an IR-taggant selected from the group consisting of an inorganic ceramic nanoparticle, an IR-emitting organic dye, and an IR-emitting quantum dot; -
wherein the IR-taggant has an emission peak in the wavelength range of about 800 to 1600 nm; a crystalline polyester resin; and an amorphous polyester resin. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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4. (canceled)
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16. A method for providing an emulsion aggregation toner for authenticating an item, comprising:
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forming an IR-taggant dispersion in water, wherein the emulsion comprises an IR-taggant, a surfactant and a colorant; mixing the IR-taggant dispersion with a resin dispersion, wherein the resin dispersion comprises a crystalline polyester resin and an amorphous polyester resin to form a latex emulsion; aggregating the latex emulsion to form toner particle cores; forming a shell over the toner particle cores to form toner particles; coalescing the toner particles; and cooling the toner particles. - View Dependent Claims (17)
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18. A method for confirming authenticity of an item, comprising:
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using an emulsion aggregation toner for use in a printing apparatus to form text or image on a substrate, wherein the emulsion aggregation toner comprises; an IR-taggant is selected from the group consisting of an inorganic ceramic nanoparticle, an IR-emitting organic dye, and an IR-emitting quantum dot; a crystalline polyester resin; and an amorphous polyester resin; exposing the formed text or image on the substrate to infrared light; detecting the IR-emitting feature upon exposure to the infrared light. - View Dependent Claims (19, 20)
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Specification