Ink Set Bright Pigment Uniformity on Plain Paper
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Solution Overview
Problem
Existing ink-jet recording methods struggle to achieve satisfactory brightness and smoothness on recording media with poor surface smoothness, such as plain paper, due to the uneven distribution of bright pigment ink, which leads to blur and unevenness.
Innovation Solution
An ink set comprising a treatment agent containing fumed silica and a bright pigment ink with urethane resin, where the fumed silica enhances the absorption of solvent and retention of bright pigment on the surface, preventing blur and unevenness, even on low-smoothness media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If resin ink is applied to smooth the surface of recording medium with poor surface smoothness, then surface smoothness is improved, but the solvent of bright pigment ink cannot permeate the recording medium smoothly causing blur and unevenness
Solution Approach 1:
The invention divides the surface treatment function into two separate components: a resin ink layer applied first to provide surface smoothness, and a bright pigment ink layer applied subsequently. This segmentation allows each layer to perform its specific function without interfering with the other, resolving the contradiction between surface smoothing and pigment uniformity.
Solution Approach 2:
The resin ink is applied as a preliminary base layer before the bright pigment ink is discharged. This preliminary action creates a smooth surface foundation that enables the subsequent bright pigment ink to permeate and distribute uniformly, preventing blur and unevenness while maintaining surface smoothness.
2Illumination intensity
If bright pigment ink is discharged on recording medium with poor surface smoothness, then brightness can be achieved, but diffuse reflection occurs causing blur and unevenness
Solution Approach 1:
A resin ink base layer is applied in advance to create a smooth surface foundation. This preliminary action ensures that when the bright pigment ink is subsequently discharged, it can permeate uniformly without causing diffuse reflection, thereby maintaining both brightness and uniformity.
Solution Approach 2:
The resin ink layer acts as an intermediary between the bright pigment ink and the recording medium. This intermediary layer provides surface smoothness that prevents diffuse reflection while allowing the bright pigment ink to permeate uniformly, thus resolving the contradiction between achieving brightness and maintaining uniformity.
3Shape
If resin components are used to smooth the surface, then surface smoothness is improved, but the resin components prevent solvent permeation causing blur
Solution Approach 1:
The invention segments the functional requirements by applying resin ink separately as a base layer, distinct from the bright pigment ink. This segmentation allows the resin to provide surface smoothness without preventing solvent permeation, as the bright pigment ink can still penetrate through the resin layer uniformly, preventing blur.
Solution Approach 2:
The invention changes the physical and chemical parameters of the resin ink layer by controlling its composition and properties to ensure it provides surface smoothness while remaining permeable to the bright pigment ink solvent. This parameter adjustment resolves the contradiction between surface smoothing and solvent permeation.
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 ink set effectively inhibits blur and unevenness, ensuring good brightness and improved image quality on recording media with poor surface smoothness, such as plain paper and matte paper.
Implementation Method 1
the fumed silica enhances the absorption of solvent and retention of bright pigment on the surface
Implementation Method 2
resin ink, which is obtained by dispersing or dissolving resin components in a solvent in advance, is applied on an area, of the recording medium, where the bright pigment ink is to be discharged, to smooth the unevenness on the surface of the recording medium
Data Source
AI summary
An ink set includes a treatment agent containing fumed silica and a bright pigment ink containing a bright pigment and water. The treatment agent or the bright pigment ink contains urethane resin.