Security, information document

Details Security, information document Security, information document

1991-03-11

1992-09-22

Bell, Paul A.

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing electromagnetic radiation

283 94, 283902, B42D 1500

Patent

active

051491400

ABSTRACT:
A security, information document for providing information to a reader from an information source organization includes a document substrate having a first area in which a half-tone warning image is printed, indicating that a copy of the document is an unauthorized document. A half-tone background image is printed in a second area on the substrate, with the second area surrounding the first area. A camouflage image extends over the document substrate for confusing the eye of an observer such that the warning image is not readily observed. One of the half-tone warning image and the half-tone background image is printed with a half-tone screen of such a line spacing that it is not readily reproducible by a copier. The camouflage image may contain an identification of the source of the information.

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