Method of marking for deterring fraud with valuable documents

Printed matter – Having revealable concealed information – fraud preventer or... – Utilizing electromagnetic radiation

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Details

156277, 283 94, 283904, 427261, 428201, 428204, 428206, 428207, 428212, 428690, 428915, 428916, B42D 1500

Patent

active

046276424

ABSTRACT:
The present invention relates to a method for deterring fraud with documents having monetary value such as a PVC substrate having a signature location on the substrate. In the method, a supporting ink layer 2 including a pigment and containing a product that assures it a certain porosity with respect to the substrate is deposited on the signature location; then a transparent, porous varnish layer 3 including a dissolved powder enabling a fluorescence of the desired color to be obtained under ultraviolet light is deposited on certain zones of the first ink layer 2; next a filigree pattern is printed in zones of either the first ink layer 2 or the varnish layer 3, using a silkscreening process and a second pigmented vinyl ink 4. The signature or identifying mark of the owner of the document is executed using a felt-tip pen having an indelible ink, of the type which is indelible to a product such as that sold under the mark "CORRECTOR". This method makes it possible to reveal any attempt at fraud and makes unauthorized reproductions of the documents more difficult.

REFERENCES:
patent: 2984030 (1961-05-01), Hannon
patent: 3545380 (1970-12-01), Comegys et al.
patent: 3886083 (1975-05-01), Laxer
patent: 4006050 (1977-02-01), Hurst
patent: 4184701 (1980-01-01), Franklin et al.
patent: 4298217 (1983-11-01), Moraw et al.
patent: 4504083 (1985-03-01), Devrient et al.
patent: 4506915 (1985-03-01), Haghiri-Tehrani et al.

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