LASER CUTTING AND LASER DISCOLOURATION OF SECURITY DOCUMENTS

摘要

The invention relates to a method for producing a security feature for a security element, a security paper or a data carrier, wherein a substrate is provided which is modifiable by laser radiation in terms of its color, introduced by the action of laser beam in the beam cross-section intensity-distributed laser radiation holes of a certain hole diameter in the substrate become.;According to the invention, a first laser beam introduces the holes in the substrate and a second laser beam performs the modification of the color of the substrate. The two laser beams are combined into a single laser beam, wherein the combined laser beam is guided onto the surface of the substrate.