Security marking method and composition

Details Security marking method and composition Security marking method and composition

1995-06-05

1996-05-14

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 21A, 427 7, 427145, 427157, C09D 1100, B41M 314

Patent

active

055163629

ABSTRACT:
A security marking method and composition wherein a first marking is applied to a surface of a substrate with a mixture of a printing medium and a first composition, wherein the first marking is visible to an unaided human eye and is indistinguishable from a marking applied with the printing medium alone, to an unaided human eye when illuminated by visible light or ultraviolet light. A second composition is added either with the mixture or thereafter, wherein the second composition is reactable with the first composition to fluoresce and wherein the fluorescing is only visible to an unaided human eye when illuminated by ultraviolet light.

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patent: 4610806 (1986-09-01), Rosen
patent: 4629630 (1986-12-01), Devrient
patent: 5084205 (1992-01-01), Auslander
patent: 5091006 (1992-02-01), Sarada et al.
patent: 5114478 (1992-05-01), Auslander et al.
patent: 5135569 (1992-08-01), Mathias
patent: 5421869 (1995-06-01), Gundjian et al.

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