Method of producing a document with an unforgeable surface relie

Details Method of producing a document with an unforgeable surface relie Method of producing a document with an unforgeable surface relie

1993-07-02

1995-07-18

Engel, James J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

235491, 283 91, 283 92, 156234, B32B 3100

Patent

active

054338077

ABSTRACT:
Documents and data, patterns, etc., applied thereto, which are present in the form of a surface relief, in particular in the form of embossed characters, are provided partially in the area of this surface relief with luminescent substance which is testable visibly and by machine. The luminescent substance is introduced either into raised or into depressed areas of the surface relief, so that characteristic features of the surface relief are reflected in its spatial distribution. The data can thus be tested for falsification and at the same time for authenticity in a simple way.

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