James River Corporation of Virginia

Kim W Robinson

Robert Patterson

Richard W Detrick

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.

Growing community of inventors

Menasha, WI, United States of America

Kim W Robinson