Method of rendering a document or portion of it resistant to pho

Details Method of rendering a document or portion of it resistant to pho Method of rendering a document or portion of it resistant to pho

1988-11-08

1992-02-11

Gallagher, John J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

156277, 283109, 283114, 283902, 355201, 427 7, 427261, 428203, 428916, 430 10, B32B 300

Patent

active

050875078

ABSTRACT:
An article with at least a portion carrying symbols representing information to be protected against photocopying is formed by a carrier, a continuous layer covering the portion of the carrier and forming a background thereon, and a mainly discontinuous layer applied on the continuous layer and forming the symbols against the background. One of the layers is an iridescent layer of a color that copies dark and the other of the layers has a dark color. Thus photocopying gives an image without distinction between the symbols and the background.

REFERENCES:
patent: 4118122 (1978-10-01), Rees

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