METHOD FOR MANUFACTURE OF PRINTING MATTER WITH MAIN AND LATENT IMAGES Russian patent published in 2004 - IPC

FIELD: printing arts. SUBSTANCE: the latent image is transformed to a digital hologram in the system of production of the Fourier hologram with a reference point source and a randomized phase of object radiation, its image is obtained and the matter is printed, changing the mutual position of the main image and the image of the hologram from impression to impression. In case of a multicolored latent image its color separation is performed, holograms are calculated through the respective color channels in the conditions of coinciding coordinates of the reference sources and phase of object radiations, and a multicolored hologram is obtained. EFFECT: enhanced degree of protection of printing matter against forgery at a simplified procedure of restoration of the latent image, enhanced creative possibilities in the design of printing matter. 2 cl, 7 dwg