Layered Security Paper Moiré Pattern Generation
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Solution Overview
Problem
Existing security papers lack enhanced security features that can effectively deter counterfeiting and provide both machine-readable and visual authenticity verification without increasing production costs or complexity.
Innovation Solution
A layered security paper with an optically variable structure featuring a printed screen and a three-dimensional screen, where the screens are applied at specific angles and using various printing methods to create moiré patterns and color-changing effects, allowing hidden information to be visible only under certain viewing conditions or with special instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple printing passes are used to apply different security layers, then the security features become more complex and comprehensive, but the production time and manufacturing cost increase
Solution Approach 1:
The patent combines multiple security layers (printed screen, three-dimensional screen, and optically variable structure) into a single integrated layered article. This merging allows all security features to be applied simultaneously in one printing pass rather than requiring multiple separate passes, thereby maintaining comprehensive security verification while improving production efficiency and reducing manufacturing time.
Solution Approach 2:
The layered article structure serves multiple security functions simultaneously: the printed screen provides baseline security patterns, the three-dimensional screen adds depth and angle-dependent visibility, and the optically variable structure provides additional verification layers. This multi-functionality in a single integrated structure eliminates the need for multiple separate printing operations.
2Reliability
If traditional security features are applied, then authenticity verification is possible, but counterfeiting can still occur and additional verification methods are required
Solution Approach 1:
The patent incorporates an optically variable structure that exhibits color changes and optical effects depending on the viewing angle and lighting conditions. This dynamic optical response provides multiple verification states within a single structure, allowing authenticity to be verified through simple visual inspection without requiring complex additional verification devices or methods.
Solution Approach 2:
The patent adds a three-dimensional screen layer that creates depth perception and angle-dependent visibility. This dimensional addition allows security features to be verified through simple angular observation rather than requiring complex verification equipment, as the three-dimensional structure naturally provides different visual information at different viewing angles.
3Manufacturing precision
If the width of lines in the printed screen is reduced to increase detail, then the resolution and information density improve, but the manufacturing precision requirements increase
Solution Approach 1:
The patent nests multiple security layers within a single layered article structure, with the printed screen, three-dimensional screen, and optically variable structure integrated together. This nesting allows detailed security information to be embedded within the composite structure without requiring excessively fine line widths in any single layer, as the combined effect of all layers provides the overall security detail and information density.
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 enhances security by providing optically variable effects on both sides of the paper, reduces production costs by minimizing printing machine passes, and enables both machine-readable and visual authenticity verification, thus improving the overall security and efficiency of the manufacturing process.
Implementation Method 1
the mutual arrangement of a printed screen and a three-dimensional screen provides the formation of a moiré in the form of color stripes smoothly transiting into each other
Implementation Method 2
A data carrier with an optically variable structure having an embossed structure and a coating contrasting with the surface of the data carrier, and to an embossing die for producing such an optically variable structure
Data Source
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AI summary
The claimed group of inventions discloses a layered product on a paper or polymer substrate with an optically variable structure, and also a method for manufacturing same. The layered product comprises a coating in the form of a printed screen, and a three-dimensional screen. The three-dimensional screen is made in the form of elements with a symmetrical and/or asymmetrical profile to form a relief on both sides of the substrate, and is so arranged in respect to the printed screen that the three-dimensional screen is at least partially located above the printed screen. The width of lines, the distance between lines of the printed and three-dimensional screens and the mutual orientation of the screens are selected such that they form a moire image which is hidden, when the data carrier is viewed at a right angle, and becomes visible when the data carrier is viewed at an acute angle. The present invention provides an increase in the security of products, and also an increase in the technological effectiveness and a reduction in the cost of the security element owing to the reduction of passes in a printing machine.