| 摘要 |
Claimed is a security paper for the production of e.g. banknotes or identity cards, and incorporating two or more holes (12, 16). The first hole (12) is formed during the paper manufacturing process and bears characteristic marginal (14) irregularities. The second hole is incorporated after the paper manufacturing process has been completed. The second hole is formed by cutting or punching and has a sharply defined edge (18). The two holes have a spatial relationship to each other. The margins around each hole bear supplementary information relating to each other e.g. an image, mark or code. The second hole is surrounded by foil and cut by laser beam. The security paper product is of pre-determined thickness and further incorporates a zone of reduced thickness incorporating the second aperture and a watermark. Further claimed is a process to manufacture a commensurate security document. |
