METHOD FOR PRINTING ON A PORTABLE DATA MEDIUM, PARTICULARLY A SMART CARD, AND RESULTING PRINTED DATA MEDIUM

摘要

PURPOSE: A method for printing on an exposed polymer rised thermoplastic or curable layer of the body of a portable data medium, and a portable data medium, particularly a chip card comprising a polymer rised layer, are disclosed. CONSTITUTION: The method comprises the steps of mixing a polymerizable thermoplastic or curable binder and at least one light-sensitive compound responsive to laser radiation having a predetermined wavelength in such a way that it changes from a first state to a second colored state, in order to form a mixture; exposing the mixture to the laser radiation having a predetermined wavelength; and polymer rising the mixture to form the polymer rised layer of the body of the data medium. The method is particularly suitable for printing on smart cards.