AUSWEISKARTE MIT VISUELL SICHTBAREM ECHTHEITSMERKMAL UND VERFAHREN ZU IHRER HERSTELLUNG

The identity card (1) contains at least one layer (7) which is suitable for lettering. Information is written into this laye using a laser beam. The information is made irreversibly visible by changes of the optical properties effected by the laser beam The layer to be lettered is a lacquer layer in...

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Bibliographische Detailangaben
Hauptverfasser: HENKENSCHUH, HORST, KRUSCHE, REINHARD, LOB, ERWIN, BERGMANN, MATTHIAS
Format: Patent
Sprache:ger
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Zusammenfassung:The identity card (1) contains at least one layer (7) which is suitable for lettering. Information is written into this laye using a laser beam. The information is made irreversibly visible by changes of the optical properties effected by the laser beam The layer to be lettered is a lacquer layer in which additives, which are absorbent for the wavelengths of the laser writer introduced.