SECURITY MARK AND METHOD FOR THE PRODUCTION THEREOF

摘要

The present invention relates to holography and printing arts. A unit matrix is used with the initial holographic micropattern, at least one projection of said micropattern having cuts and/or faceted pyramid-shaped indentations, e.g., from a diamond indenter. The projections of the initial holographic micropattern are subjected to deformation in the unity matrix, which results in the cuts and/or faceted indentations in the micropattern. After stamping copies of the initial holographic micropattern on the metalized layer of the polymer film with a master matrix, additional latent images are applied to its demetallized areas. Fluorescent pigment is added to the protection masks. The security mark 7 (Fig. 3) consists of a polymer film 8 with a metalized layer 9, and an adhesive layer 10 covered with wax paper 12. A surface with the holographic micropattern 11 having alternate elements is formed on the metalized layer of the polymer film, said alternate elements being the exact copy of the initial holographic micropattern of the unit matrix. A latent image 13 is applied to the polymer film. The polymer film comprises demetalized areas 14 to which a latent image 15 is applied. The areas with the metalized layer are covered with a protection mask 16 which comprises a fluorescent pigment forming a running pattern in the mark. A separate area of the holographic micropattern is made with an altered diffraction efficiency, different from the diffraction efficiency of the rest of the surface of said micropattern. In addition to the applied latent image another latent image is formed in the security mark.