Tamper resistant system using ultraviolet fluorescent chemicals

Details Tamper resistant system using ultraviolet fluorescent chemicals Tamper resistant system using ultraviolet fluorescent chemicals

1993-09-30

1997-02-25

Hess, B. Hamilton

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

250365, 250372, 283 92, 283 94, 427 7, 427265, 428484, 428690, 428916, B41M 314

Patent

active

056057385

ABSTRACT:
A release agent is first applied to a target article and on top of the release agent is applied an ultraviolet radiation fluorescent material to enable fraud detection. To prevent fraud, a security label may also be used comprising a label substrate, a release layer, a layer of ultraviolet radiation fluorescent material, and an adhesive layer for adhering to a target article. When the substrate is peeled off, part of the ultraviolet sensitive material will be peeled off also to enable detection.

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patent: 3922435 (1975-11-01), Asnes
patent: 4146792 (1979-03-01), Stenzel et al.
patent: 4186020 (1980-01-01), Wachtel
patent: 4451530 (1984-05-01), Kaule et al.
patent: 4627642 (1986-12-01), Peronneau et al.
"Photochromic Papers or Filmes for Noncopyable Documents," by Japan Tokkyo Koho JP 8553981, Mar. 1989.

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