Method for individualising security documents and corresponding security document
AssigneeGiesecke & Devrient GmbH
InventorsMichael Bauer, Werner Bochmann
Life of this patent
Estimating the term…
Abstract
A method for individualizing security documents provides that high security quality, application-neutral printed image 1 identical for a group of security documents is overprinted with second printed image 2 individualizing the security document, whereby the printing ink of second printed image 2 is repelled by the printing ink of first printed image 1. The printing ink of the second printed image is therefore deposited only in the areas of the first printed image where no printing ink of the first printed image is present. Preferably, the first printed image is produced by intaglio printing and the second printed image by means of liquid printing ink, in particular by the ink jet method.
Claims13
A method for individualizing security documents comprising the steps of:
- intaglio printing a document to create a first, high security quality embossed ink printed image in the document comprising mutually contrasting light and dark areas, and
- printing at least part of the first printed image with a second printed image, wherein the material selected for printing the second printed image is a printing ink that is flowable at least at the time of printing and repelled either by the dark areas or by the light areas of the first printed image and is deposited in the accordingly other areas so that it remains only in said other areas.
Dependencies are inferred from the claim text.