| 摘要 |
A document with anti-counterfeiting means to prevent reproducibility by photocopying, having a sheet-like element (2) that has, on its face, at least one region whereon an image (3) that is visible or not visible in the visible-light range is printed and has, on the back, in register with the image provided on the face, the same image, printed with an ink that is not visible in the visible-light range. <IMAGE> |
