Fiduciary or security object enabling visual or optical authenti

Details Fiduciary or security object enabling visual or optical authenti Fiduciary or security object enabling visual or optical authenti

1987-10-08

1989-10-17

Niebling, John F.

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing electromagnetic radiation

283 91, 283 74, 25230133, B42D 1500

Patent

active

048741884

ABSTRACT:
The present invention relates to the authentication of fiduciary or security objects, such as official documents, contracts, banknotes, credit cards and computer diskettes.
The object to be authenticated is marked with a matrix composed of an organic resin of the vinyl or acrylic type, or any other similar resin, incorporating a series of sparkling doping materials and a series of photoluminescent doping materials with long-lasting remanence.
This marking is carried out by coating, transfer of a film, printing, or integration of particles into the fiduciary material. The document marked in this manner can, in addition, be covered with a substance which is transparent in the visible spectrum going from UV to IR with the exception of a given wavelength band.
The object marked in accordance with the invention has a first color in daylight, a second color when it is submitted to ultraviolet radiation and a third color from long-lasting when it is placed in darkness.

REFERENCES:
patent: 4161388 (1979-07-01), Bouchard et al.
patent: 4208300 (1980-06-01), Grauisse
patent: 4442170 (1984-04-01), Kaule et al.
patent: 4451530 (1984-05-01), Kaule et al.
patent: 4500116 (1985-02-01), Ferro et al.
patent: 4705300 (1987-11-01), Berning et al.

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