Anti-counterfeiting Pattern with Dynamic Optical Variable Effect
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Solution Overview
Problem
Existing anti-counterfeiting patterns in the banknote printing industry lack a dynamic optically variable effect, with limited color shifting and requiring precise observation angles, making them unsuitable for quick identification and wide industrial application.
Innovation Solution
A dynamic optically variable anti-counterfeiting pattern is achieved through a combination of full-page colored prints and high narrow stereoscopic lines using engraving gravure, where the lines are overprinted with complementary colors, allowing for continuous color changes when rotated or inclined, enhancing public identifiability and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If offset printing is used for anti-counterfeiting patterns, then accurate design and color reproduction are achieved, but the pattern lacks dynamic optical variable effect and requires precise observation angles
Solution Approach 1:
The patent combines offset printing technology with engraving gravure blind embossing to create a composite anti-counterfeiting pattern. The offset printed pattern is embossed to form relief structures that generate dynamic optical variable effects through angle-dependent light reflection, while maintaining the accuracy and color reproduction benefits of offset printing
Solution Approach 2:
The patent creates dynamic optical variable effects by forming relief structures through blind embossing that change their light reflection characteristics based on viewing angle. The embossed pattern produces continuous color shifting and dynamic visual changes when rotated or viewed from different angles, eliminating the need for precise observation angles
2Ease of manufacture
If engraving gravure blind embossing is used, then dynamic optical effect is generated, but the pattern requires accurate overprinting with offset printing which has high device requirements and poor uniformity
Solution Approach 1:
The patent merges offset printing with engraving gravure blind embossing in a multi-step process where the offset printed pattern serves as the base layer that is subsequently embossed. This combination allows the system to achieve both the dynamic optical effects from the relief structures and the manufacturing precision from offset printing, while the embossing step adds the dynamic effect without requiring additional overprinting operations
3Ease of manufacture
If parallel lines are used for invisible anti-counterfeiting pattern, then dynamic variable engraving gravure is generated, but the pattern cannot produce dynamic color shifting effect
Solution Approach 1:
The patent replaces traditional parallel line structures with curved or circular arc patterns in the embossed relief structures. These curved geometries are specifically designed to generate continuous color shifting effects through angle-dependent light reflection, while maintaining the dynamic variable optical effects. The curved patterns create rainbow-like color transitions that are not achievable with straight parallel lines
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 provides a continuous and distinct color shifting effect when rotated or inclined, making the pattern easily identifiable and difficult to forge, overcoming the limitations of previous technologies and enabling broader industrial application in security anti-counterfeiting.
Implementation Method 1
the overprinting combination of two colored print forms causes a continuous and dynamic optically variable effect when the whole overprinting area is rotated along with the view angle
Implementation Method 2
generate a distinct color changing effect when inclining 50-90 degree, and generate a color shifting effect when horizontal-rotating
Data Source
Figure 1A~1
Figure 2A~3
AI summary
The present invention discloses a pattern with an enhanced dynamic optically variable anti-counterfeiting effect and a preparation method thereof, wherein the pattern with the enhanced dynamic optically variable anti-counterfeiting effect consists of a full-page colored print form and a colored print form having high narrow stereoscopic lines, wherein the colored print form having high narrow stereoscopic lines is overprinted on the full-page colored print form; the colored print form having high narrow stereoscopic lines has a shape of combined lines, comprising a curve line, a straight line, a dot matrix or a combination thereof; the interval of the lines is 100-300% times of the width of the lines, and the height of the lines is 10-100% times of the width of the lines; the color of the colored print form having high narrow stereoscopic lines is a complementary color of the color of the full-page colored print form in a color gamut space, or is visually significant different with the color of the full-page colored print form. The present invention is realizable to generate a continuous optically variable effect when inclining or rotating a printed product, i.e., generate a distinct color changing effect when inclining, and a strong color shifting effect when horizontal-rotating, which is visual, readily to identify, anti-copying and difficult to forgery.