Recording Medium Ink-Receiving Layer Structure for Color Development
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Solution Overview
Problem
Current recording media with matte surfaces experience insufficient color development when using dye inks due to the trade-off between matte appearance and transparency, while pigment inks are not adequately enhanced by existing solutions.
Innovation Solution
A recording medium structure comprising a substrate with a first ink-receiving layer containing inorganic particles of 50 nm or less and a second ink-receiving layer with amorphous silica of 3.2 µm or more, adjacent to the first layer, to improve color development for both dye and pigment inks while maintaining a matte appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a layer mainly composed of wet silica with average secondary particle size of 1.5 to 2.5 μm is formed on a layer mainly composed of inorganic particles with average secondary particle size of 500 nm or less, then color development of images is improved, but matte appearance is maintained
Solution Approach 1:
The ink-receiving layer is divided into two distinct layers with different particle size ranges. The first layer contains fine inorganic particles (500 nm or less) that provide transparency, while the second layer contains coarser wet silica particles (1.5 to 2.5 μm) that enhance color development. This segmentation allows each layer to perform its specific function without interfering with the other, resolving the contradiction between transparency and color development.
Solution Approach 2:
Different regions of the ink-receiving layer are assigned different particle size characteristics. The lower layer (first ink-receiving layer) uses fine particles optimized for transparency and light transmission, while the upper layer (second ink-receiving layer) uses coarser particles optimized for ink absorption and color development. This local differentiation of properties allows simultaneous optimization of both contradictory requirements.
2Shape
If particles with large particle size are used in the ink-receiving layer, then matte appearance is achieved, but transparency is reduced due to light scattering
Solution Approach 1:
The ink-receiving layer is segmented into two layers with different particle size characteristics. The first layer uses fine inorganic particles (500 nm or less) to maintain transparency and reduce light scattering, while the second layer uses coarser wet silica particles (1.5 to 2.5 μm) to provide matte appearance and enhance ink absorption. This segmentation allows both transparency and matte appearance to coexist.
Solution Approach 2:
The solution moves from a single-layer structure to a two-layer vertical structure. By distributing different particle size functions across different vertical layers, the patent achieves both transparency (from the fine-particle lower layer) and matte appearance (from the coarse-particle upper layer) simultaneously, effectively resolving the contradiction through dimensional organization.
3Illumination intensity
If an ink-receiving layer with high transparency is used to improve color development of dye inks, then color development is enhanced, but matte appearance is compromised
Solution Approach 1:
The ink-receiving layer is segmented into two layers where the first layer (lower) contains fine inorganic particles for transparency and color development, while the second layer (upper) contains coarser wet silica particles for matte appearance. This segmentation allows the transparency needed for dye ink color development to coexist with the matte appearance requirement.
Solution Approach 2:
Different layers are assigned different optical properties locally. The lower layer is optimized for transparency to enhance color development, while the upper layer is optimized for matte appearance. This local quality differentiation resolves the contradiction between color development and matte appearance.
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 configuration enhances the transparency and color development of images formed with both dye and pigment inks, maintaining a matte appearance by reducing light scattering and optimizing the density of amorphous silica particles in the ink-receiving layers.
Implementation Method 1
a first ink-receiving layer which contains inorganic particles having an average particle size of 50 nm or less
Implementation Method 2
enhances the transparency and color development of images formed with both dye and pigment inks, maintaining a matte appearance by reducing light scattering and optimizing the density of amorphous silica particles
Data Source
AI summary
A recording medium includes a substrate, a first ink-receiving layer, and a second ink-receiving layer adjacent to the first ink-receiving layer in this order. The first ink-receiving layer contains an inorganic particle having an average particle size of 50 nm or less, and the second ink-receiving layer contains an amorphous silica having an average particle size of 3.2 µm or more.