| 摘要 |
FIELD: printing industry. ^ SUBSTANCE: invention relates to secured paper to manufacture protected or secured documents, for instance bank notes, identity cards and similar, which has at least two through holes. According to the invention, the first of through holes is provided in process of paper making and has specific irregularities at edge section, while the second of through holes is made after paper making by means of carving or piercing and has a sharply contoured section of edges, at that outlines of contours of the first and second through holes are compositely joined. ^ EFFECT: secured paper provides for a high extent of counterfeit protection, with simplicity of its authentication. ^ 63 cl, 32 dwg |
