Secure Document Printing with Segmented Guilloche Patterns
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Solution Overview
Problem
Current secure document production methods are vulnerable to fraud, as the guilloche pattern, while difficult to reproduce initially, becomes easy to counterfeit if a malicious party obtains the document post-production, as laser printing and typefaces used for personalization are easily replicable.
Innovation Solution
A method involving two distinct printing techniques for a secure document, where the first part of the guilloche pattern is printed during production and the second part, including personalized data, is printed during personalization using a different technique like laser printing, with precise positioning ensured by reference points, making counterfeiting extremely difficult.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a guilloche pattern is printed during the production phase and personalization data is printed later using laser printing, then the document can be personalized efficiently, but the document becomes vulnerable to counterfeiting as laser printing and typefaces are easy to reproduce
Solution Approach 1:
The guilloche pattern is divided into two distinct parts: a first part printed during the production phase using offset printing, and a second part printed during the personalization phase using laser printing. This segmentation ensures that neither part alone can be used to create a complete counterfeit document, as both parts are required for the full pattern and both printing techniques must be coordinated with precise alignment.
2Reliability
If the entire guilloche pattern is printed during the production phase, then the pattern provides strong security as it is difficult to reproduce, but the document cannot be personalized efficiently later
Solution Approach 1:
The first part of the guilloche pattern is printed in advance during the production phase, establishing a secure baseline that is difficult to reproduce. This preliminary action allows the document to maintain high security while enabling efficient personalization later, as only the second part of the pattern needs to be printed during personalization, rather than the entire pattern.
3Reliability
If two different printing techniques are used for the two parts of the pattern, then counterfeiting becomes extremely difficult due to alignment requirements, but the manufacturing process becomes more complex
Solution Approach 1:
Reference points are introduced as intermediary elements that facilitate the alignment between the first part (printed during production) and the second part (printed during personalization). These reference points serve as a common reference system that bridges the two different printing techniques and phases, enabling precise alignment without requiring complex coordination between the production and personalization processes.
4Manufacturing precision
If reference points are used for positioning the printing device, then precise alignment between the two pattern parts is achieved, but the pattern design becomes more complex
Solution Approach 1:
Reference points are strategically placed at specific locations within the guilloche pattern where they can serve their positioning function without disrupting the overall aesthetic and security properties of the pattern. The reference points are integrated into the pattern design in a way that maintains the guilloche's visual continuity and security features while providing the necessary alignment references for the two-printing-process system.
Data Source
AI summary
This method for manufacturing a secure document comprising at least one layer and a pattern enabling verification of the authenticity of said document, comprises: - a first step (E20) of printing at least a first part (IMG1) of the pattern on a first layer using a first printing technique; - a step (E40) of positioning a printing device (200) with respect to said secure document (10) using reference points printed during said first printing step and detected by this device; and - a step (E50) of printing a second part (IMG2) of said pattern on a second layer by the printing device using a second printing technique different from the first printing technique, said second part of the pattern not fully covering said first part of the pattern.