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Security document with a validity feature and method for the production thereof and device for checking

A technology for security documents and documents, applied in the field of security documents, can solve problems such as easy counterfeiting, and achieve the effect of coherent ink transfer

Active Publication Date: 2013-07-17
BUNDESDRUCKEREI GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Additionally, alphanumeric codes printed onto security documents are relatively easy to counterfeit compared to other security features

Method used

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  • Security document with a validity feature and method for the production thereof and device for checking
  • Security document with a validity feature and method for the production thereof and device for checking
  • Security document with a validity feature and method for the production thereof and device for checking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] In order to produce a security document with effective features, two different inks are applied to the security document along a marking direction with different concentration profiles. figure 1 The concentration curves 1 , 2 for example for red and cyan inks are shown schematically correspondingly for the marking direction 3 along the figure 1 The abscissa of the graphical view of . The ordinate 4 of the diagrammatic view describes the concentration of the ink or the concentration of the pigments contained in the ink. The different inks are preferably selected in such a way that, with suitable mixing (suitable concentration ratios), these inks lead to a white color impression with respect to the color superposition of the fluorescence emitted by these inks. If, for example, red is selected as the first ink and the first ink is assigned in figure 1 In the concentration change curve with reference number 1 set in it and indicated as a solid line, cyan is selected as th...

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PUM

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Abstract

The invention relates to a security document, a method for the production and a device for checking the validity of the security document, wherein at least two different colors are applied to the security document at least in one region (7) that is visible from a lateral surface, said colors exhibiting different concentration gradients (1,2) along a marked direction (3) in said region (7), wherein the at least two different colors are fluorescent colors, wherein the concentration gradients (1, 2) are selected such that when exciting the fluorescence, an area (9) of a marked color is perceivable and the at least two colors have different life spans, wherein the concentration gradients (1, 2) and the dimensions of the region (7) along the marked direction (3) are selected such that after production with a predetermined validity duration, a perceivable shift of the area (9) of the marked color impression takes place.

Description

technical field [0001] The invention relates to a security document comprising a document body in which at least two different inks are applied, at least in areas visible from a page, said at least two different inks along In this region along a marking direction, there are mutually different concentration curves, wherein the at least two different inks are fluorescent inks. Furthermore, the invention relates to a method for producing such a document and a method for verifying such a security document with respect to the features encoded in the security document. Background technique [0002] Security documents are documents that have so-called security features that make counterfeiting or counterfeiting more difficult than simple copying. Security documents are mainly used as identity documents, such as travel passports, identity documents, identification cards, as driving licenses, but also as securities, such as banknotes, credit cards, bank cards, vignette images, tax s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B42D15/00
CPCB42D25/387G07D7/122B42D15/10B42D25/29B42D25/00B42D15/0013B42D2035/40G07D7/1205
Inventor M·普夫罗格霍夫特M·佩施克O·穆特M·哈格曼
Owner BUNDESDRUCKEREI GMBH