| 摘要 |
anti-forgery protective means. SUBSTANCE: information carrier with an optically variable structure, impressed raster is so combined with the coating which is contrast relative to the surface of the information carrier that different optically variable effects arise at different angles of view. The impressed raster and/or coating are so made that especially typical or additional effects arise that are fit for determination of authenticity of the information carrier, however, they cannot be reproduced with the aid of duplicators in general or not in accordance with the original. EFFECT: enhanced reliability of protection against forgery of information carrier. 32 cl, 29 dwg |
