| 摘要 |
A device for making security marks by means of a plurality of simultaneously backing and printing dies, each with a pre-designed image. The device makes it possible to subject a sheet of paper to a novelty simultaneous abrasion and printing method of a security mark using the dies previously and smoothly inked by means of inking rollers with either one or more inks not visible to the naked eye, but revealable by one or more temporarily applicable revealing stimuli, wherein the security mark shows as authentication evidence a pre-designed image invisible to the naked eye, but which becomes visible in many different ways, and at least one second form of verification under a revealing stimulus, wherein all forms in which the images are revealed on the paper have an absolute matching location because they are produced simultaneously and by the same backing and printing die. |
