White Ink Adhesion Control for High-Speed Recording
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Solution Overview
Problem
Existing recording methods for transparent or non-white media, such as flexible packaging films and sign graphics, face challenges in achieving both high image quality and fast printing speeds, particularly when using a laminating method with a white ink layer as the background.
Innovation Solution
A recording method and apparatus that perform relative scanning for both white and non-white ink adhesion steps on the same scanning region of the recording medium, with the white ink composition making up 60% or less of the total adhesion amount, eliminating the need for laminating each ink layer and allowing for simultaneous adhesion of both inks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a laminating method with white ink layer as background is used, then image quality and visibility are improved, but printing speed becomes slow
Solution Approach 1:
The patent merges the white ink adhesion step and non-white ink adhesion step into a single scanning process. Both inks are adhered simultaneously during one relative scanning motion between the recording head and recording medium, eliminating the need for separate laminating steps while maintaining image quality through controlled adhesion amounts.
Solution Approach 2:
The patent changes the adhesion amount parameter of white ink to 60% by mass or less with respect to 100% by mass of non-white ink adhesion amount. This parameter optimization allows the white ink to provide sufficient background coverage for image visibility while enabling faster drying and simultaneous adhesion of non-white inks, thus improving printing speed without sacrificing image quality.
2Manufacturing precision
If white ink adhesion amount is increased to improve background coverage, then image visibility is improved, but printing speed decreases due to longer drying time
Solution Approach 1:
The patent optimizes the white ink adhesion amount to 60% by mass or less relative to non-white ink adhesion amount. This parameter change provides sufficient background coverage for image visibility on transparent and non-transparent media while reducing drying time enough to enable simultaneous adhesion processes, thereby maintaining high printing speed.
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
This approach enables the formation of images with excellent color developability and image quality while significantly improving printing speed by eliminating the laminating step, and is particularly effective on low-absorption or non-absorption recording media.
Implementation Method 1
a white ink adhesion step of adhering a white ink composition containing a white color material to the recording medium, and a non-white ink adhesion step of adhering a non-white ink composition containing a non-white color material to the recording medium
Data Source
AI summary
A recording method according to the present disclosure is a recording method that performs recording on a recording medium, the recording method including a white ink adhesion step of adhering a white ink composition containing a white color material to the recording medium and a non-white ink adhesion step of adhering a non-white ink composition containing a non-white color material to the recording medium, in which the white ink adhesion step and the non-white ink adhesion step are performed by relative scanning between a recording head and the recording medium, the white ink adhesion step and the non-white ink adhesion step are performed by the same relative scanning on the same scanning region of the recording medium, and in the recording region to which the white ink composition and the non-white ink composition are adhered, an adhesion amount of the white ink composition is 60% by mass or less with respect to 100% by mass of an adhesion amount of the non-white ink composition per unit region.