Stable emissive toner composition system and method
First Claim
1. An emissive toner composition for marking an article with an image indicia for authentication, information, or decoration, the composition comprising:
- a photoluminescent agent that emits light having one or more dominant emission peaks in the visible spectrum, each of the one or more dominant emission peaks centered at a corresponding emission wavelength, when irradiated with energy in the ultraviolet spectral region;
a charge control agent that is chemically compatible with the photoluminescent agent and that does not emit light in the visible spectrum when irradiated with visible light and does not emit light in the visible spectrum when irradiated with energy in the ultraviolet spectral region;
one or more additives that are compatible with the photoluminescent agent and the charge control agent and that do not emit light in the visible spectrum when irradiated with visible light and do not emit light in the visible spectrum when irradiated with energy in the ultraviolet spectral region; and
the photoluminescent agent, the charge control agent, and the one or more additives forming an emissive toner composition having an emission spectra that includes only dominant emission peaks corresponding to the one or more dominant emission peaks of the photoluminescent agent, as measured in an image component printed on a substrate and irradiated with energy in the ultraviolet spectral region.
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Accused Products
Abstract
A method of producing an emissive toner composition including selecting a photoluminescent agent, a charge control agent, and one or more additives and combining the photoluminescent agent, charge control agent, and one or more additives to form an emissive toner composition that when printed to produce an image component on a substrate, the emission spectra of the image component for irradiation with a first excitation energy includes only dominant emission peaks corresponding to one or more dominant emission peaks of the photoluminescent agent. The photoluminescent agent is selected such that it emits light having one or more dominant emission peaks in a first emission spectral region when irradiated with the first excitation energy. The charge control agent and one or more additives are selected such that they do not emit light in the visible spectrum when irradiated with visible light and does not emit light in the first emission spectral region when irradiated with the first excitation energy.
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Citations
18 Claims
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1. An emissive toner composition for marking an article with an image indicia for authentication, information, or decoration, the composition comprising:
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a photoluminescent agent that emits light having one or more dominant emission peaks in the visible spectrum, each of the one or more dominant emission peaks centered at a corresponding emission wavelength, when irradiated with energy in the ultraviolet spectral region; a charge control agent that is chemically compatible with the photoluminescent agent and that does not emit light in the visible spectrum when irradiated with visible light and does not emit light in the visible spectrum when irradiated with energy in the ultraviolet spectral region; one or more additives that are compatible with the photoluminescent agent and the charge control agent and that do not emit light in the visible spectrum when irradiated with visible light and do not emit light in the visible spectrum when irradiated with energy in the ultraviolet spectral region; and the photoluminescent agent, the charge control agent, and the one or more additives forming an emissive toner composition having an emission spectra that includes only dominant emission peaks corresponding to the one or more dominant emission peaks of the photoluminescent agent, as measured in an image component printed on a substrate and irradiated with energy in the ultraviolet spectral region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An emissive toner composition for marking an article with an image indicia for authentication, information, or decoration, the composition comprising:
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a photoluminescent agent that emits light having one or more dominant emission peaks in the visible spectrum, each of the one or more dominant emission peaks centered at a corresponding emission wavelength, when irradiated with energy in the ultraviolet spectral region, the photoluminescent agent not emitting light in the visible spectrum when irradiated with visible light; a charge control agent that is chemically compatible with the photoluminescent agent and that does not emit light in the visible spectrum when irradiated with visible light and does not emit light in the visible spectrum when irradiated with energy in the ultraviolet spectral region, the charge control agent being present in a charge control effective amount and the charge control effective amount being reflectively invisible; one or more additives that are compatible with the photoluminescent agent and the charge control agent and that do not emit light in the visible spectrum when irradiated with visible light and do not emit light in visible spectrum when irradiated with energy in the ultraviolet spectral region; and the photoluminescent agent, the charge control agent, and the one or more additives forming an emissive toner composition having an emission spectra that includes only dominant emission peaks corresponding to the one or more dominant emission peaks of the photoluminescent agent, as measured in an image component printed on a substrate and irradiated with energy in the ultraviolet spectral region. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An emissive toner composition for producing an emissive image component of an image indicia on a substrate, the composition comprising:
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a photoluminescent agent that emits light having one or more emission peaks in the visible spectrum, each of said one or more emission peaks centered at a corresponding emission wavelength, when irradiated with energy in the ultraviolet spectral region; a charge control agent; and one or more additives, said photoluminescent agent, charge control agent, and one or more additives forming a toner composition having an emission spectra that includes only dominant emission peaks in the visible spectrum corresponding to said one or more emission peaks of said photoluminescent agent, as measured in an image component printed on a substrate and irradiated with energy in the ultraviolet spectral region, the image component has a photoluminescent toner stability factor of about greater than or equal to 25, wherein the photoluminescent toner stability factor is calculated according to the following equation;
PTSF=((1−
ALF-XE)×
ALF-QUV)×
100,where PTSF is the photoluminescent toner stability factor, ALF-XE is the average loss in photoluminescence of said image component from day 3 to day 7 of a seven day xenon-arc exposure at 0.35 W/m2 at 340 nm with said image component distanced from said xenon arc exposure at 10 inches and a temperature of 50 degrees Celsius, ALF-QUV is the average loss in photoluminescence of said image component from day 3 to day 7 of submission of said image component to QUV exposure conditions.
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Specification