Ink Jet Recording Method Using Coagulant Reaction Liquid
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Solution Overview
Problem
The existing ink jet recording methods using non-ink-absorbing and low-ink-absorbing recording media face issues with image quality and wet abrasion resistance due to the lack of a coagulant in the ink composition, leading to deterioration in the quality of recorded matter.
Innovation Solution
An ink jet recording method that involves using a reaction liquid with a coagulant having solubility of 120 g or less in 100 g of water, combined with an ink composition containing a resin with a water absorption percentage of 0.3% or less, to form a first and second recorded region, enhancing wet abrasion resistance and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If recording is performed on low absorbent or non-absorbent recording media using conventional ink jet methods, then high-speed printing is achieved, but wet abrasion resistance deteriorates
Solution Approach 1:
The reaction liquid is applied to the recording medium in advance before the ink composition is attached. This preliminary action creates a coagulated layer that prepares the surface for subsequent ink attachment, enabling the ink to be fixed more effectively and resist wet abrasion while maintaining high-speed printing capability
Solution Approach 2:
The reaction liquid containing coagulant serves as an intermediary substance between the recording medium and the ink composition. It mediates the interaction by coagulating components of the ink composition upon contact, creating a stable layer that improves wet abrasion resistance without compromising printing speed
2Device complexity
If conventional ink compositions are used without coagulant, then the ink jet recording process is simple, but image quality deteriorates
Solution Approach 1:
The invention changes the chemical parameter of the ink composition by adding a coagulant with specific solubility characteristics (120 g or less in 100 g of water). This parameter change enables the coagulant to effectively coagulate ink components upon contact with the reaction liquid, significantly improving image quality while maintaining relatively simple ink composition and process
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 method achieves excellent wet abrasion resistance and high-definition images on low absorbent or non-absorbent recording media by effectively coagulating ink composition components with the coagulant, improving image quality and resistance.
Implementation Method 1
a reaction liquid attaching process of attaching a reaction liquid containing a coagulant which coagulates components of an ink composition
Implementation Method 2
an ink composition attaching process of attaching the ink composition containing water and a resin having a percentage of water absorption of 0.3% or less
Data Source
AI summary
An ink jet recording method includes a reaction liquid attaching process of attaching a reaction liquid containing a coagulant having solubility of 120 g or less in 100 g of water as a coagulant which coagulates components of an ink composition to a low absorbent recording medium or a non-absorbent recording medium to form a first recorded region, and an ink composition attaching process of attaching the ink composition containing water and a resin having a percentage of water absorption of 0.3% or less to at least one part of the first recorded region to form a second recorded region.