Recording Medium Camouflage Layer for Magnetic Material Concealment
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Solution Overview
Problem
Magnetic materials used in recording media are easily visible due to their blackish color and low lightness, making it difficult to maintain information security as they can be recognized as enhanced security papers, thereby hindering the progress of information security and potentially leading to leakage and falsification of confidential information.
Innovation Solution
A recording medium with a matrix material and a magnetic material is developed, where the contrast density of the surface is reduced to 0.05 or less by using a camouflage layer, insulation layer, and specific layer structures to make the magnetic material less visible, utilizing methods such as coating with a camouflage material, dense pulp fiber coverage, or lamination to match the color tone of the matrix material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic material is added to printing paper for information security, then information security is improved, but visibility of magnetic material increases making it easily recognizable
Solution Approach 1:
The patent applies color matching between the magnetic material and the printing paper by controlling the lightness value (L*) to be 85 or higher. This makes the magnetic material visually indistinguishable from the surrounding paper, eliminating the blackish appearance that would otherwise reveal the presence of magnetic material and compromise security through obvious identification.
Solution Approach 2:
The patent changes the optical parameters of the magnetic material by controlling its lightness (L* ≥ 85) and contrast density (≤ 0.05). These parameter adjustments transform the magnetic material from a visibly dark substance to one that is optically matched with the white printing paper, thereby concealing its presence while maintaining its security function.
2Reliability
If magnetic material is used in printing paper, then anti-copying capability is improved, but the paper becomes easily identifiable as secure paper
Solution Approach 1:
By matching the color of the magnetic material to the printing paper through lightness control (L* ≥ 85), the patent makes secure paper visually indistinguishable from ordinary paper. This eliminates the obvious visual markers that would otherwise identify the paper as having enhanced security features, thereby preventing targeted copying attempts.
Solution Approach 2:
The patent uses the printing paper matrix as an intermediary that conceals the magnetic material. The magnetic material is embedded within the paper structure and its optical properties are adjusted to match the surrounding matrix, allowing it to serve as both the security feature and the camouflage simultaneously.
3Reliability
If magnetic material is dispersed in printing paper, then information security is enhanced, but contrast density increases making magnetic material visible
Solution Approach 1:
The patent precisely controls the optical parameters of the magnetic material, specifically setting lightness L* ≥ 85 and contrast density ≤ 0.05. This precise parameter control ensures that the magnetic material dispersed in the paper does not create visible contrast, maintaining both security functionality and visual inconspicuousness.
Solution Approach 2:
The patent applies different optical properties to different components: the magnetic material is given high lightness (L* ≥ 85) to match the paper matrix, while the paper itself maintains its normal optical properties. This local quality differentiation allows the magnetic material to be concealed while the overall paper maintains its normal appearance and function.
Data Source
AI summary
An aspect of the present invention provides a recording medium including a matrix material and a magnetic material, wherein the contrast density of the surface is about 0.05 or less.