Color copy resistant document using irregular outline letters in

Details Color copy resistant document using irregular outline letters in Color copy resistant document using irregular outline letters in

1980-12-22

1983-12-13

Bell, Paul A.

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing electromagnetic radiation

283 94, 283902, B42D 1500

Patent

active

044201753

ABSTRACT:
A color-copier resistant document is disclosed which includes a repeated invalidating phrase printed on a document, together with a background tone. In addition to having an overlay camouflage tone printed over the entire surface of the document, each of the invalidating images is formed of irregular, smooth-shaped letters which further advance their hiding characteristics. Overall sizes are suggested for the use of the invalidating word VOID, and stroke sizes for each of the letters are also disclosed.

REFERENCES:
patent: 3130984 (1964-04-01), Fenberg
patent: 4227719 (1980-10-01), McElligot et al.

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