Sicherheitsdokument mit Mitteln zur Authentifizierung und Methode zur Authentifizierung von Sicherheitsdokumenten

摘要

A security document according to the invention comprises substrate means 2 and security means 5 for authentication provided on a predetermined area 4 of said substrate means. The security means comprises means selectively reflecting visible light depending on the temperature and means changing the temperature depending on the application of a magnetic field. The means selectively reflecting light and the means changing the temperature are arranged as to form said security means exhibiting different colors depending on a magnetic field applied to the substrate means. In a preferred embodiment of the invention, the means selectively reflecting visible light comprises liquid crystals and the means changing the temperature comprises gadolinium.