Multilayer Security Thread With Concealed Magnetic Varnish
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing security documents, such as banknotes, require a multilayer body with magnetic properties that is difficult to reproduce and provides a striking optical effect while ensuring the magnetic varnish is not visible from certain observation directions.
Innovation Solution
A multilayer body comprising a carrier layer, color layer, metal layer, and magnetic varnish layer, arranged in specific orders on the upper and underside of the carrier layer, along with additional adhesion-promoter and masking varnish layers, to create a secure and visually appealing security thread.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic varnish layer is applied to provide magnetic properties for machine verification, then the security document can be checked by machine, but the magnetic varnish may be visible and disrupt the overall impression of the document
Solution Approach 1:
The patent applies magnetic varnish to the underside of the carrier layer rather than the upper side, effectively moving the magnetic functionality to a different spatial dimension. This allows the magnetic properties to be accessible for machine verification from below while keeping the upper side visually clean and free of disruptive magnetic varnish appearance.
Solution Approach 2:
The carrier layer acts as an intermediary between the magnetic varnish and the observer. By placing the magnetic varnish on the underside of the carrier layer, the carrier layer mediates the interaction, allowing magnetic field penetration for machine verification while blocking the visual appearance of the magnetic varnish from the upper side.
2Reliability
If multiple layers are applied to create a striking optical effect and conceal the magnetic varnish, then the security document becomes difficult to reproduce and visually appealing, but the manufacturing process becomes more complex
Solution Approach 1:
The patent divides the security element into distinct functional layers: carrier layer, magnetic varnish layer, color layer, and metal layer. Each layer serves a specific function (structural support, magnetic verification, visual appearance, optical effect), allowing the complex security functionality to be achieved through modular layering rather than a single complex structure.
Solution Approach 2:
The patent creates a composite multilayer structure combining different materials with distinct properties: the carrier layer provides structural integrity, the magnetic varnish provides magnetic verification capability, the color layer provides visual appearance, and the metal layer provides optical effects. This composite structure achieves high security and visual appeal while allowing each material to be optimized for its specific function.
Data Source
AI summary
A multilayer body (1) as well as a method for producing a multilayer body (1). The multilayer body (1) includes at least one carrier layer (10), at least one color layer (12), at least one metal layer (13) and at least one magnetic varnish layer (14) has, wherein the carrier layer (10), in particular the multilayer body (1), has an upper side (31) and an underside (32), and wherein the layers of the multilayer body (1) are arranged in such a way, in particular in the following order, thata) the at least one color layer (12), the at least one metal layer (13), and the at least one magnetic varnish layer (14) are applied to the underside (32) of the carrier layer (10); orb) the at least one metal layer (13) and the at least one color layer (12) are applied to the upper side (31) of the carrier layer (10) and the at least one magnetic varnish layer (14) are applied to the underside (32) of the carrier layer (10).