Security Document Ink Penetration via Microstructured Recesses
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Decentralized production of security documents lacks the high level of security against falsification due to removable protective layers, which can be replaced or reapplied, resulting in lower security against subsequent counterfeiting.
Innovation Solution
A method involving a lamination body with microstructured indentations on its surface, where individualization information is printed such that it penetrates into these depressions, making manipulation difficult and ensuring that new information cannot completely overwrite the original, thereby enhancing security against counterfeiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If individualization information is printed on the outer surface of a security document blank in a decentralized manner, then productivity and ease of operation are improved, but reliability and security against falsification deteriorate because protective layers can be removed and reapplied
Solution Approach 1:
The patent applies preliminary action by creating microstructured indentations on the outer surface of the lamination body before printing the individualization information. These pre-formed recesses ensure that the printed information penetrates into the substrate structure, making it impossible to remove and reapply without detection. This preliminary structural preparation resolves the contradiction by enabling decentralized production while maintaining high security against falsification.
2Reliability
If individualization information is stored on an inner layer with good connection between plastic layers, then security against manipulation is improved, but device complexity and manufacturing difficulty increase requiring large production facilities
Solution Approach 1:
The patent applies local quality by creating microstructured indentations only in the specific marking areas where individualization information will be printed, rather than requiring complete monolithic lamination throughout the entire document. This localized approach provides enhanced security at the critical information storage locations while avoiding the complexity and cost of centralized monolithic production facilities.
3Reliability
If a lamination body is formed to make manipulation difficult, then security is improved, but ease of manufacture deteriorates as it requires centralized production facilities
Solution Approach 1:
The patent applies segmentation by dividing the lamination body into multiple substrate layers that can be separately prepared and then assembled. The microstructured indentations are created on the outer surface of the assembled lamination body, allowing decentralized production while achieving the security benefits of a monolithic structure. This segmented approach resolves the contradiction between security and ease of manufacture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly enhances the security of individualized security documents by making it difficult to manipulate or overwrite the embedded information, providing improved protection against falsification and counterfeiting.
Implementation Method 1
Printing is carried out in such a way that part of the printed ink penetrates into the indentations
Data Source
Figure 1~3
Figure 2a~2b
Figure 4a~4e
AI summary
The invention relates to a method for producing an individualized security document (90), comprising the steps: providing a plurality of substrate layers; assembling the substrate layers into a substrate layer stack; laminating the substrate layers assembled in the substrate layer stack into a lamination body; providing a digital printing apparatus; printing at least one marking region of an outer surface (19) of the lamination body (11) by means of the digital printing apparatus to save individualization information (18); wherein a micro-structure having a plurality of recesses (14) is imprinted into the lamination body (11) before printing into the outer surface (19) in the at least one marking region (7) and the printing occurs such that a portion of the printed ink penetrates into the recesses (14).