Metallic Ink Application Sequence for Glossy Color Images
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Solution Overview
Problem
Existing image-recording technologies face challenges in producing desired metallic colors with a metallic luster using metallic ink and chromatic color ink combinations, as they struggle to achieve optimal aggregation and permeation of dyes on the silver layer, leading to inconsistent color development and low glossiness.
Innovation Solution
An image-recording apparatus with a conveyance unit and recording head that applies metallic ink and chromatic color inks in a specific sequence, utilizing nozzles for each ink type, allowing for controlled application timing based on dye aggregability to form a metallic color image with desired color tone and high glossiness, by ensuring the metallic ink layer is formed before the chromatic color ink and allowing sufficient drying time for the dye fixative to aggregate the dyes effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If metallic ink and chromatic color ink are applied simultaneously or without controlled timing, then the recording process is simplified, but the dye aggregation and permeation on the silver layer becomes inconsistent, resulting in poor color development and low glossiness
Solution Approach 1:
The metallic ink is applied first to form a silver layer on the recording medium, creating a foundation for subsequent chromatic color ink application. This preliminary action ensures that the silver layer is properly formed and dried before dyes are applied, enabling consistent dye aggregation and permeation for optimal color development and glossiness
Solution Approach 2:
The recording process is divided into separate stages: first applying metallic ink, then applying chromatic color ink in subsequent passes. This segmentation allows each ink type to be optimized independently with appropriate drying time, ensuring proper dye aggregation on the silver layer without compromising color consistency or glossiness
2Productivity
If chromatic color ink is applied immediately after metallic ink without sufficient drying time, then the recording efficiency is improved, but the dye fixative cannot properly aggregate the dyes, leading to poor color development
Solution Approach 1:
The recording process uses periodic action with multiple passes: the metallic ink is applied in one pass, then the recording medium is conveyed forward, and chromatic color ink is applied in subsequent passes after a time interval. This periodic approach ensures sufficient drying time for dye fixative aggregation while maintaining continuous production flow for high recording efficiency
Solution Approach 2:
The metallic ink layer is formed and allowed to dry completely before chromatic color ink application. This preliminary action ensures the silver layer is ready to receive and properly aggregate the dyes, guaranteeing optimal color development quality while the conveyor system maintains high productivity
3Manufacturing precision
If multiple print scans are used to apply different inks in sequence, then the dye aggregation and color tone control is improved, but the recording time increases
Solution Approach 1:
The recording apparatus maintains continuous useful action by using an overlapping nozzle array configuration where metallic ink nozzles and chromatic color ink nozzles are positioned to enable continuous recording across multiple passes. The recording medium is continuously conveyed through the system, and nozzles overlap to ensure uninterrupted ink application, minimizing idle time while achieving precise color tone control through sequential ink application
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 solution enables the creation of recorded materials with consistent metallic colors and high glossiness by controlling the application timing of metallic and chromatic inks, ensuring the dyes aggregate properly on the silver layer, resulting in vivid color tones and improved image quality.
Implementation Method 1
a receiving layer containing a dye fixative that aggregates a dye
Implementation Method 2
a metallic ink containing metal particles
Implementation Method 3
a first chromatic color ink containing a coloring material of the dye and a second chromatic color ink containing a coloring material of the dye
Data Source
AI summary
Applying a metallic ink, then applying a chromatic color ink with high dye aggregability, and then applying a chromatic color ink with low dye aggregability improve the color development of the chromatic color ink with low dye aggregability.