Ink Jet Recording Method Glossiness Control
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Solution Overview
Problem
Ink jet recording methods on non-absorbable or low-absorbable recording media face issues with bleeding and degraded image quality due to ink spreading, and abrasion resistance, particularly when using processing solutions that affect glossiness uniformity.
Innovation Solution
An ink jet recording method that simultaneously applies a colored ink composition and a clear ink composition using a processing solution containing an aggregating agent, with overlapping ejection regions in the sub scanning direction to improve image quality and reduce glossiness deviations on non-absorbable or low-absorbable recording media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a processing solution is used to improve image quality by reducing bleeding, then image quality is improved, but glossiness deviations occur and abrasion resistance is degraded
Solution Approach 1:
The patent divides the ink system into two separate components: a colored ink composition and a clear ink composition. The clear ink is applied in regions adjacent to and overlapping with the colored ink, allowing the colored ink to aggregate and reduce bleeding while the clear ink maintains glossiness and provides abrasion resistance, thereby resolving the contradiction between image quality improvement and glossiness uniformity
Solution Approach 2:
The clear ink composition acts as an intermediary substance that mediates between the colored ink and the recording medium. It provides a protective layer that maintains consistent glossiness across the recorded image while allowing the colored ink to perform its aggregation function, thus resolving the glossiness deviation issue caused by processing solutions
2Manufacturing precision
If a processing solution is used to aggregate ink constituents and reduce bleeding, then bleeding is reduced, but abrasion resistance is degraded since ink does not penetrate into the recording media
Solution Approach 1:
The patent creates a composite ink system by combining colored ink composition and clear ink composition. The colored ink provides aggregation and bleeding control, while the clear ink provides abrasion resistance and protection. This composite approach allows both functions to coexist without compromising either bleeding control or abrasion resistance
Solution Approach 2:
The clear ink is applied in advance or simultaneously with the colored ink in overlapping regions, creating a protective framework before the colored ink fully settles. This preliminary action ensures that the ink aggregate structure is formed with proper adhesion and abrasion resistance from the outset, rather than being applied afterward as a separate processing step
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 effectively reduces glossiness deviations and enhances abrasion resistance while maintaining high image quality by aggregating ink constituents and improving ink adhesion on non-absorbable or low-absorbable recording media.
Implementation Method 1
a processing solution (reaction solution) that contains an aggregating agent for causing coloring constituents in ink to aggregate
Data Source
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AI summary
Provided is an ink jet recording method that is performed on a low-absorbable or non-absorbable recording medium using a processing solution that contains a colored ink composition, a clear ink composition, and an aggregating agent for aggregating constituents in the colored ink composition, the method including: a process of causing the processing solution that contains the aggregating agent to adhere to the recording medium; and a process than is performed through main scanning in which the colored ink composition and the clear ink composition are ejected while relative positions of a carriage with an ink jet head mounted thereon and the recording medium are changed to a main scanning direction and sub scanning in which the relative positions of the carriage and the recording medium are changed to a sub scanning direction that intersects the main scanning direction, in which the main scanning that involves a region where a recording region in which the colored ink composition is ejected from the ink jet head in the main scanning and a recording region in which the clear ink composition is ejected from the ink jet head in the main scanning overlap with one another is performed.