Ink-jet Recording Boundary Area Formation for Bleeding Prevention
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Solution Overview
Problem
Existing ink-jet recording methods face challenges in preventing bleeding between achromatic and chromatic color areas, leading to reduced recording quality, and require additional reactive inks or mechanisms, increasing costs.
Innovation Solution
An ink-jet recording method using an ink set comprising an achromatic color ink and at least three chromatic color inks to form specific boundary areas with controlled widths, eliminating the need for additional treating liquids or mechanisms, and enhancing recording quality by using achromatic colors for boundary formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reactive color ink or printing performance enhancing liquid is used to suppress bleeding at the boundary portion, then the bleeding prevention is improved, but the device complexity and cost increase due to requiring separate mechanisms for these additional liquids
Solution Approach 1:
The patent combines the bleeding prevention function with the existing ink set by forming a boundary area using a mixture of achromatic color ink and chromatic color inks. This merges the boundary formation function into the regular printing process, eliminating the need for separate reactive ink systems or performance enhancing liquid mechanisms.
Solution Approach 2:
The achromatic color ink and chromatic color inks serve multiple functions: they form the boundary area to prevent bleeding while also contributing to the overall color image formation. This multi-functionality allows the existing ink set to handle both boundary prevention and color recording without additional specialized components.
2Reliability
If a thinning out area is formed at the boundary portion to suppress bleeding, then the bleeding prevention is improved, but the recording quality deteriorates because the thinning out area color is limited to the recording medium color
Solution Approach 1:
The patent applies local quality by forming a boundary area with specific color characteristics (achromatic color) at the boundary portion between achromatic and chromatic recording areas. This localized color treatment prevents bleeding while maintaining appropriate color appearance in the boundary region, unlike thinning out areas that are limited to the recording medium color.
Solution Approach 2:
The boundary area is formed using a composite approach by mixing achromatic color ink and chromatic color inks in specific proportions. This creates a boundary region with controlled color properties that prevents bleeding while maintaining recording quality, rather than simply reducing ink amount as in thinning out areas.
3Manufacturing precision
If the boundary area width is reduced to be unrecognizable, then the recording quality is improved, but the bleeding prevention effectiveness may be reduced if the boundary area is too narrow
Solution Approach 1:
The patent optimizes the boundary area width parameter to a specific range (20 μm to 200 μm, preferably 50 μm to 150 μm). This parameter control ensures the boundary area is narrow enough to be unrecognizable and maintain recording quality, while still wide enough to effectively prevent bleeding between adjacent recording areas.
Data Source
AI summary
There is provided an ink-jet recording method including: formation of an achromatic color recording area in a recording medium by using an achromatic color-ink; formation of a chromatic color recording area in the recording medium by using at least one chromatic color-ink; and formation of a boundary area including a first achromatic color boundary area formed by the achromatic color-ink and the chromatic color-inks, and a second achromatic color boundary area formed by the chromatic color-inks, wherein the first achromatic color boundary area is located to be adjacent to the achromatic color recording area, and the second achromatic color boundary area is located to be adjacent to the chromatic color recording area; and the boundary area is formed to have a width of not more than 340 μm, and the second achromatic color boundary area is formed to have a width of not more than 170 μm.