Identification card with hallmarks adapted to be inspected by tr

Details Identification card with hallmarks adapted to be inspected by tr Identification card with hallmarks adapted to be inspected by tr

1979-10-04

1981-12-29

Bell, Paul A.

Printed matter

Calendar

40 22, 283 8R, 350314, 350316, B42D 1502, G09F 302

Patent

active

043078990

ABSTRACT:
A hallmark for example for a solid plastic identification card consisting of a plurality of layers is described. The hallmark is formed by means of only partially overlapping color coatings on a monochromatic or monochromatically printed substrate foil. More plastic foils are laminated onto the substrate foil, if desired. Single-layer printed portions of the surface appear bright in transmitted light and dark in incident light; multi-layer printed portions of the surface appear dark in transmitted light and bright in incident light, thus producing a watermark-like effect.

REFERENCES:
patent: 2110500 (1938-03-01), Chiera
patent: 2506153 (1950-05-01), Hurley
patent: 3414998 (1968-12-01), Berger
patent: 3802101 (1974-04-01), Scantlin
patent: 4124947 (1978-11-01), Kuhl

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