Scratchable Image Formation Using Pressure-Fixed Masking Toner
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Solution Overview
Problem
Traditional methods for forming scratchable images using thermoplastic toner often result in damage to the base image during removal of the masking layer, impairing visibility.
Innovation Solution
A method involving pressure-fixing a masking pressure toner onto a base image on a substrate to form a masking layer, which creates distinct fixability and physical properties between the masking layer and the base image, allowing for easy removal of the masking layer without damaging the base image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If thermoplastic toner is used to form the masking layer, then the masking layer can be removed by scratching, but the base image is damaged during removal, impairing visibility
Solution Approach 1:
The patent applies local quality by creating distinct physical and chemical properties in different layers: the masking layer uses pressure-sensitive toner with different fixability characteristics than the base image layer. This local differentiation allows the masking layer to be selectively removed by scratching while the base image remains intact and undamaged.
Solution Approach 2:
The patent changes the physical parameters of the toner material by using pressure-sensitive toner instead of conventional thermoplastic toner. The pressure-sensitive toner has different melting point, adhesion properties, and response to mechanical stress, enabling it to be removed by scratching without damaging the base image, thus resolving the contradiction between removability and image integrity.
2Ease of manufacture
If conventional printing methods are used to form the masking layer, then the process is well-established, but the masking layer cannot be easily removed without damaging the base image
Solution Approach 1:
The patent changes the material parameter from thermoplastic toner to pressure-sensitive toner, which fundamentally alters the removal mechanism. The pressure-sensitive toner can be removed by mechanical scratching force without requiring thermal processing, enabling easy removal while maintaining compatibility with existing printing infrastructure.
Solution Approach 2:
The patent replaces the thermal removal mechanism (heating to melt thermoplastic toner) with a mechanical removal mechanism (scratching to remove pressure-sensitive toner). This substitution enables easier operation for end-users while maintaining ease of manufacture through standard printing processes.
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
This approach ensures excellent visibility of the base image after removing the masking layer and facilitates easy on-demand formation of scratchable images with improved removability and fixability.
Implementation Method 1
pressure-fixing a masking pressure toner onto a base image on a substrate to form a masking layer
Implementation Method 2
The scratchable masking layer have been typically formed by offset printing, gravure printing, screen printing, or another printing
Data Source
AI summary
A method for forming a scratchable image includes pressure-fixing a masking pressure toner onto a base image on a substrate to form a masking layer.