Patent ID: 7706700
Filing Date: 2010-04-27
Classification: B41J,G03G

Abstract:
1. A method for authenticating an electrostatographic material, comprising: tagging an electrostatographic material with at least one fluorescent tag, wherein the fluorescent tag is present in the electrostatographic material in an amount of from about 0.01 to about 100 ppm; generating an energy source for stimulating an emission of fluorescent light from the fluorescent tagged electrostatographic material; stimulating the emission of fluorescent light from the fluorescent tagged electrostatographic material; subjecting the stimulated emission of fluorescent light from the fluorescent tagged electrostatographic material to a filter to remove background interference before measuring the emission of fluorescent light from the fluorescent tagged electrostatographic material at the predetermined wavelength, wherein the filter is selected from the group consisting of an acousto-optic tunable filter, a fiber tunable filter, a thin-film interference filter, an optical band-pass filter, and a digital filter; measuring the emission of fluorescent light from the fluorescent tagged electrostatographic material at a predetermined wavelength; and identifying a test electrostatographic material as authentic when the measured emission of fluorescent light from the test electrostatographic material meets a predetermined emission of fluorescent light from the fluorescent tagged electrostatographic material at the predetermined wavelength.