Multiple color fluorescence security imprint

Abstract

A method for creating a security mark includes applying a first color fluorescence ink to a substrate and applying a second color fluorescent ink to the substrate is provided. The second color fluorescent ink overlies at least a portion of the substrate where said first color fluorescent ink is applied. A third color is applied to the substrate adjacent the substrate area where said second color fluorescent ink is applied. The first color fluorescent ink, the second color fluorescent ink and the third color border are such that a security mark is formed on the substrate. The blue color fluorescence, the red color fluorescence and the third color on the substrate are such that when viewed through a lens the security mark optical characteristics change. The change is from the optical characteristics of the security mark when the security mark is not illuminated with fluorescence-exciting radiation to a different optical characteristics when the security mark is illuminated with fluorescence exciting radiation.