Dual-Sided Fluorescent Planchettes for Counterfeit-Resistant Security Paper
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Solution Overview
Problem
Existing security paper counterfeit protection measures are expensive and can be easily overcome, and there is a challenge in raising public awareness, particularly for bank notes, with known methods like dual or multi-colour fibres being easily replicable by counterfeiters.
Innovation Solution
A planchette for security paper with different fluorescent colors on each side, utilizing a UV absorbent layer to create a striking color-switch effect when viewed under UV light, and optionally incorporating a machine-readable element, making it difficult for counterfeiters to replicate the exact registration of colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dual or multi-colour fibres are used for counterfeit protection, then the security feature becomes more visually appealing and harder to detect by casual observers, but counterfeiters can easily replicate them using simple highlighter pens or printers with fluorescent ink
Solution Approach 1:
The planchette is divided into multiple colored regions (first colored region and second colored region) that are spatially segmented and positioned at specific locations. This segmentation creates a complex multi-colour pattern that is visually appealing but difficult to replicate, as counterfeiters would need to precisely reproduce multiple colored areas in correct positions and proportions
Solution Approach 2:
Different regions of the planchette have different local qualities - specific colors in specific locations (first colored region with first color, second colored region with second color). This creates a non-uniform distribution of visual properties that enhances security, as replicating the exact local color distribution requires precise control beyond simple fluorescent ink application
2Reliability
If complex multi-colour planchettes are used to deter counterfeiting, then the security feature becomes more difficult to replicate, but the manufacturing process and design complexity increase
Solution Approach 1:
The planchette design is segmented into distinct colored regions rather than using complex gradients or patterns. This segmentation simplifies the manufacturing process while still achieving high counterfeit resistance, as each region can be applied or formed independently
Solution Approach 2:
The planchette incorporates a third dimension through its physical structure - it is a raised or embossed element on the paper surface. This dimensional addition enhances security without requiring complex multi-layer printing, as the three-dimensional form itself becomes part of the security feature that is difficult to replicate with flat printing processes
3Reliability
If planchettes are embedded in paper to prevent casual counterfeiting, then the security of the paper substrate is significantly enhanced, but the cost of paper production and processing increases
Solution Approach 1:
Instead of embedding expensive pre-manufactured planchettes into the paper, the invention creates the planchette security feature by printing colored regions directly onto planchette shapes that are then embedded in the paper. This copying approach significantly reduces costs, as the colored regions are applied using standard printing processes rather than requiring expensive pre-manufactured security elements
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 planchette provides a cost-effective, visually striking, and machine-detectable security feature that is hard to counterfeit, enhancing the security of documents like bank notes and passports.
Implementation Method 1
The first colorant may optionally produce the first colour only as fluorescence, when illuminated by ultraviolet light. The second colorant may optionally produce the second colour only as fluorescence, when illuminated by ultraviolet light.
Implementation Method 2
The sheet may comprise a UV absorbent material between the first colorant and the second colorant.
Data Source
Figure 1~2
AI summary
A security paper (200) including a plurality of planchettes (100), each planchette (100) being a sheet having a first face and a second face, the first face having a first colour and the second face having a second, different, colour.