Printed matter – Having revealable concealed information – fraud preventer or... – Utilizing electromagnetic radiation
Patent
1992-03-09
1992-11-10
Echols, P. W.
Printed matter
Having revealable concealed information, fraud preventer or...
Utilizing electromagnetic radiation
283 72, 283 85, 283 87, 283113, 283901, 428916, 156277, 162103, 162134, 162140, B42D 1500
Patent
active
051618290
ABSTRACT:
A security paper includes at least two layers of paper each having inner and outer surfaces and predetermined mechanical properties, color and optical density. Authentication indicia is printed on the inner surface of at least one layer. The indicia is formed of a chemically, mechanically and thermally stable medium having a predetermined color, color intensity and optical density. A chemically, mechanically and thermally stable adhesive permanently adheres the inner surfaces of the layers together. The adhesive has a predetermined color and optical density. The color and optical density of the layers, the color, color intensity and optical density of the medium and the color and optical density of the adhesive combine to render the authentication indicia detectable in transmitted light and substantially imperceptible in reflected light.
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Detrick Richard W.
Patterson Robert
Robinson Kim W.
Bryant David P.
Echols P. W.
James River Corporation of Virginia
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