Ink-Jet Recording Boundary Control for Bleeding Prevention
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Solution Overview
Problem
Existing ink-jet recording methods face challenges in preventing bleeding at color boundaries, with existing solutions either providing insufficient bleeding prevention, increasing costs due to the need for additional inks or mechanisms, or being limited by the color of the recording paper.
Innovation Solution
An ink-jet recording method and apparatus that determine the aggregation degree of inks A and B, selecting ink C to form the boundary portion based on specific conditions to prevent bleeding, using an ink set that includes at least two kinds of inks with different compositions, and a controller to manage the recording process, thereby forming the recording portions and boundary portion effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If ink is used for boundary portion based on permeability selection, then bleeding prevention is attempted, but the bleeding-preventive effect is insufficient
Solution Approach 1:
The patent applies local quality by using a thinning out area with reduced ink density at the boundary portion between different color schemes. This localized modification of ink concentration prevents bleeding at the boundary without affecting the overall image quality, as the thinning out area is specifically positioned where color transitions occur.
Solution Approach 2:
The patent implements partial action by forming a thinning out area that performs no recording or reduced recording only at the boundary portion, rather than modifying the entire image. This partial modification is sufficient to prevent bleeding while maintaining the integrity of the main image areas.
2Object-affected harmful factors
If reactive color ink or liquid for improving printing performance is used, then bleeding prevention is achieved, but additional mechanisms and costs are required
Solution Approach 1:
The patent uses standard inkjet recording apparatus capabilities to form the thinning out area, utilizing the existing ink ejection mechanism without requiring separate reactive ink systems or additional printing performance improving liquid mechanisms. The same inkjet head that records the main image also creates the thinning out area.
Solution Approach 2:
The patent combines the boundary portion treatment with the standard inkjet recording process, integrating the thinning out area formation into the normal image recording operation. This eliminates the need for separate mechanisms by merging the bleeding prevention function with the existing recording system.
3Object-affected harmful factors
If thinning out area is formed at boundary portion, then bleeding is prevented, but the color is limited to recording paper color
Solution Approach 1:
The patent applies parameter changes by adjusting the ink density or concentration in the thinning out area rather than completely eliminating ink. This allows the boundary portion to have reduced ink amount that prevents bleeding while still maintaining color consistency with the surrounding areas and the recording paper, avoiding the limitation of being restricted to only paper color.
Data Source
AI summary
An ink-jet recording method includes: determining an aggregation degree G (AB) brought about when the ink A and the ink B are brought in contact with each other, at least one of the ink A and the ink B containing a pigment; judging, based on the aggregation degree G (AB), whether or not a boundary portion PC is to be formed at a boundary between a recording portion PA of the ink A and a recording portion PB of the ink B by using an ink C; forming the recording portion PA; forming the recording portion PB; and forming the boundary portion PC if it is judged that the boundary portion PC is to be formed. In the ink jet recording method, the cost is low, the recording quality of a recorded matter is excellent, and the bleeding can be effectively avoided.