Laser marking of documents of value
OwnerSylke Klein, Michael Weiden +3inventors
InventorsSylke Klein, Michael Weiden, Wolfgang Kraas, Klaus-Christian Ullmann, Burkhard Krietsch
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Abstract
Disclosed are laser markings on a document of value and methods of preparing the same which are based on the interaction of the laser radiation with the printing-ink employed.
Claims20
A laser marking on a document of value, comprising at least one printing ink or printing-ink layer on a substrate, where the at least one printing ink or printing-ink layer comprises a laser-sensitive component, and wherein printing ink in at least one area of the at least one printing ink or printing ink layer is selectively removed by a laser, and optionally a microinscription/image is produced by the laser in a selectively removed area, and in the case where otherwise there would be complete removal of the printing ink from the marking, said microinscription/image is produced in the marking.
A method for preparing a laser marking on a document of value, complying applying to a substrate at least one printing ink or printing-ink layer, where the at least one printing ink or printing-ink layer comprises a laser-sensitive component, and selectively removing ink by a laser in at least one area of the at least one printing ink or printing-ink layer, and optionally a microinscription/image is additionally produced by the laser in a selectively removed area, and in the case where otherwise there would be complete removal of the printing ink from the marking, said microinscription/image is produced in the marking.
Dependencies are inferred from the claim text.