HOMOGENEOUS PHOTOSENSITIVE OPTICALLY VARIABLE INK COMPOSITIONS FOR INK JET PRINTING

摘要

Ink composition described are suitable for ink jet printing (ink jet inks) andare highly effective for simultaneously imparting visible and fluorescentimages. Figure 1 illustrated both visible and fluorescent images enabled byprinting the inks of the invention on a substrate, one of a printed substratein reflection under illumination by visible light and one of the same printedsubstrate fluorescing under ultraviolet excitation. The image scanned inreflection (102) was obtained by illumination the marking with visible light.The image scanned in fluorescence (104) is obtained by viewing the visible red-fluorescent emissions under ultraviolet (UV) illumination.