Identification card with hallmarks adapted to be inspected by transmitted and incident light and a process for the production thereof
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United States of America Patent
Stats
-
Dec 29, 1981
Grant Date -
N/A
app pub date -
Oct 4, 1979
filing date -
Jan 12, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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