Goniochromatic Metallic Particle Security Layer
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Solution Overview
Problem
Current security structures for documents lack effective visibility of color change effects without multilayer interferential structures or opaque backgrounds, and require complex observation methods, making them costly and difficult to implement.
Innovation Solution
A semi-transparent layer containing goniochromatic metallic particles with a metallic core, providing optical effects in reflected light and transmission, allowing for easy observation of color change without opaque backgrounds and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multilayer interferential structures or opaque backgrounds are used to achieve color change effects, then the security effect is enhanced, but the structure complexity and production cost increase
Solution Approach 1:
The patent extracts the essential function of color change from complex multilayer interferential structures and opaque backgrounds, achieving the same security effect through a single semi-transparent layer containing goniochromatic metallic particles, thereby simplifying the overall structure
Solution Approach 2:
The patent changes the key parameter of particle concentration in the semi-transparent layer to optimize the balance between opacity and transparency, enabling the layer to provide sufficient color change effect while maintaining semi-transparency and eliminating the need for opaque backgrounds
2Reliability
If multilayer interferential structures or opaque backgrounds are used to achieve color change effects, then the security effect is enhanced, but the production cost increases
Solution Approach 1:
The patent removes the need for expensive multilayer interferential structures and opaque backgrounds by using a single semi-transparent layer with goniochromatic metallic particles, significantly reducing production cost while maintaining security effect
Solution Approach 2:
The patent employs a cost-effective semi-transparent layer with metallic particles that can be easily manufactured and applied, replacing expensive and complex multilayer structures with a simpler, more economical solution
3Difficulty of detecting and measuring
If opaque backgrounds are used to observe color change effects, then the observation is clear, but the ease of operation and observation difficulty increase
Solution Approach 1:
Instead of using opaque backgrounds to enable observation, the patent inverts the approach by using a semi-transparent layer that provides clear color change observation without requiring any background, making observation easier and more direct
Solution Approach 2:
The semi-transparent layer with goniochromatic metallic particles is self-sufficient in providing color change effects visible without any background support, eliminating the need for additional opaque layers or backgrounds and simplifying the observation process
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 enables perceivable color shift effects with intrinsic opacity and goniochromatic properties, facilitating easier production and observation, while maintaining security through metallic reflective effects and customizable patterns via laser modifications.
Implementation Method 1
coated with thin layers producing a color by interference
Implementation Method 2
intrinsic opacity of said particles linked to the presence of metal and to its goniochromatic properties
Data Source
Figure 1~3B
Figure 4~8H
Figure 8F~9D
AI summary
The invention relates to a security structure (1) comprising a semi-transparent layer (20) containing a binder (40) and at least goniochromatic metal particles inside the binder in a concentration providing the layer (20) with the semi-transparency thereof.