METHOD OF MAKING HOLOGRAPHIC MARKS Russian patent published in 1995 - IPC

FIELD: protection of stocks. SUBSTANCE: multilayer mark is formed which has dielectric substrate, working thermoplastic layer, reflecting layer and cementing layer. The method concludes in forming hologram of image of mark sign onto working layer. Reflecting hologram is fixed by contact-free thermal deformation of working layer of the mark. Reflecting and cementing layers are applied in sequence after fixation. Mark is applied with its working layer to stocks due to heating thermo-cementing layer. Copying and random mechanical damage of the hologram are excluded as the hologram is protected by dielectric transparent substrate. EFFECT: improved reliability of protection. 2 cl, 5 dwg