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Ink composition containing fluorescent component and method of tagging articles therewith

  • US 5,135,569 A
  • Filed: 08/24/1990
  • Issued: 08/04/1992
  • Est. Priority Date: 08/24/1990
  • Status: Expired due to Fees
First Claim
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1. An ink composition which comprises(i) a fluorescent dye;

  • (ii) a non-fluorescing ink which masks the presence of the fluorescent dye so that fluorescence is not observed;

    (iii) a solvent for the fluorescent dye which permits the fluorescent dye to impregnate the surface of a substrate, while allowing the non-fluorescing ink to remain substantially on the surface of the substrate.

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