Security Substrate Primer Layer for Forgery-Proof Value Papers
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Solution Overview
Problem
Existing substrates for producing value or security papers, such as banknotes, lack effective means to achieve high-quality, forgery-proof security elements due to coincidence errors in shadow images and watermarks.
Innovation Solution
A substrate comprising a carrier layer, typically a polymer or paper layer, with a security element applied onto or into the carrier layer, and a primer applied to cover sections of the security element, reducing its visibility and enhancing protection against forgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shadow images or watermarks are used for forgery protection, then security features are provided, but coincidence errors occur which limit image quality and complexity
Solution Approach 1:
The security element is divided into multiple partial reflective layers, each contributing to different aspects of the image. This segmentation allows the system to achieve high-quality images without coincidence errors by distributing the imaging function across multiple independent layers rather than relying on a single layer that must align perfectly.
Solution Approach 2:
The invention uses composite structures combining multiple reflective layers with different properties. These composite materials enable the creation of complex, high-quality security images that are resistant to forgery, overcoming the limitation of single-layer shadow images that suffer from coincidence errors.
2Reliability
If polymer substrates are used for banknotes, then durability and security are improved, but production complexity increases compared to paper substrates
Solution Approach 1:
The substrate and security element design is created to be universal, allowing the same production machinery and process steps to manufacture both polymer and paper banknotes. This multi-functionality enables manufacturers to switch between substrate types without requiring separate production lines, thereby reducing overall production complexity while maintaining the durability advantages of polymer substrates.
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 substrate enables the production of papers with highly forgery-proof security elements, allowing banknote manufacturers to use the same machines and process steps for both paper and polymer banknotes, improving production efficiency and product quality.
Implementation Method 1
the security element is embodied having a partial, reflective layer that forms an image
Implementation Method 2
regions of the security element covered by the primer are less well visible than regions of the security element not covered by the primer
Data Source
AI summary
A substrate for producing papers of value or security papers is described. The substrate may include a carrier layer, at least one security element applied at least one of onto and into the carrier layer, and a primer. The primer may be applied onto at least one of a first substrate side and a second substrate side of the substrate. The primer may be arranged, at least in some sections, between the carrier layer and the at least one security element. Additionally and/or alternatively, the primer may cover the at least one security element and/or the carrier layer such that regions of the at least one security element covered by the primer are not as well visible as regions of the at least one security element and/or the carrier layer not covered by the primer. The at least one security element may include a partial, reflective layer forming an image.