White Underbase Printing With Highlight White in One Pass
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current digital image printing technologies face challenges in achieving bright, vibrant white colors on dark substrates due to ink bleeding and the need for multiple passes, which increase print time and can result in undesirable outcomes.
Innovation Solution
The method involves combining white underbase and highlight white image data to increase white ink in white-only areas, allowing for a single pass printing process using digital inkjet printers with separate ink limits for underbase and highlight white, enabling more ink to be deposited in pure white areas without bleeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a large amount of white ink is used to block out black background, then the brightness of white areas is improved, but the ink bleeds with other colors causing undesirable outcomes
Solution Approach 1:
The patent segments the white ink application into two distinct passes: first an underbase white layer is printed to block the dark substrate, then a highlight white layer is printed on top in white-only areas. This segmentation allows each layer to serve its specific function without the other's drawbacks, achieving brightness without bleeding.
Solution Approach 2:
The underbase white layer is printed first as a preliminary action before the color or highlight white layers. This preliminary white layer creates a bright foundation that blocks the dark substrate, allowing subsequent layers to be printed with less ink and without bleeding issues.
2Illumination intensity
If separate passes are used for underbase white and highlight white, then the brightness and color quality are improved, but the print time increases
Solution Approach 1:
The patent combines the underbase white and highlight white operations into a single integrated printing pass by using a specialized print head configuration that can deposit both underbase white and highlight white ink simultaneously in different areas, eliminating the need for separate passes while maintaining quality.
Solution Approach 2:
The system dynamically adjusts ink deposition based on the image content, automatically determining which areas require underbase white, which require highlight white, and which require both, all within a single pass. This dynamic adaptation eliminates the need for multiple static passes.
3Manufacturing precision
If ink limits are set to prevent bleeding, then the color quality is maintained, but the brightness of white areas decreases
Solution Approach 1:
By segmenting white ink application into underbase and highlight layers, the patent allows higher total white ink deposition without bleeding, since each layer is optimized for its specific function. The underbase layer uses sufficient ink to block the substrate, while the highlight layer adds brightness only where needed.
Solution Approach 2:
The system changes the parameter of white ink deposition by applying different amounts at different stages: the underbase layer receives higher ink density to block the substrate, while the highlight layer receives optimized ink density for maximum brightness, both within acceptable bleeding limits.
Data Source
AI summary
Techniques are provided for printing white underbase image data and highlight white image data in one pass using digital printing technologies. The techniques include increasing the white ink in the white only (or near white only) areas of the image data by combining the white underbase image data and the white ink (or near white ink) image data.