Patent ID: 9662920
Date: 2017-05-30
CPC Classifications: B41J,B41M,C09D,C09K

Claim:
1. An ink jet ink composition comprising: an organic solvent, wherein the organic solvent comprises a ketone, an alcohol, or a mixture thereof, and is present in an amount in a range of 60% to 90% by weight of the ink composition; a solubilizing agent selected from cyclic ketones; heterocyclic amides; cyclic alcohols; furans; and mixtures thereof; and two or more different luminescent dyes, wherein each luminescent dye has a different luminescence emission profile, wherein the luminescent dyes comprise an invisible fluorescent dye that absorbs ultraviolet light and emits visible light, and one or more visible fluorescent dyes that absorb the light emitted by the invisible fluorescent dye, wherein the luminescent dyes are selected from the classes of aromatic, substituted aromatic, heterocyclic, cyanine, xanthene, acridine, phenazine, napthol, porphyrrin, coumarin, pyrromethene, oxazine, oxazole, perylene, and napthalimide dyes, and combinations thereof.