Color Separation Processing Apparatus for Gravure Printing Ink Management
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Solution Overview
Problem
In printing techniques using cylinders, such as gravure printing, it is challenging to reduce defective products caused by printing shifts and excessive residual ink, especially when reproducing spot colors, as existing methods either occupy stock space with unused inks or cannot allow printing shifts due to specific ink combinations.
Innovation Solution
A color separation processing method that prepares tables with first and second colors, where the first color is obtained by toning multiple inks, and the second color is created by mixing the first color with added colors, allowing for efficient selection and mixing of inks to reproduce specified colors, thereby reducing printing shifts and residual ink waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If spot color inks are prepared by toning standard color inks to reproduce specified colors, then color reproduction accuracy is improved, but excessive residual ink is generated that cannot be used for other colors
Solution Approach 1:
The patent applies dynamics by making the ink selection and mixing process flexible and adaptive. Instead of preparing fixed spot color inks, the system dynamically selects and mixes process color inks based on the specific color sample requirements, allowing residual ink to be diverted to other color reproductions.
Solution Approach 2:
The patent changes the parameters of ink preparation by transitioning from fixed concentration spot color inks to variable concentration mixtures of process color inks. The color separation processing apparatus adjusts the mixing ratios of process color inks based on the specified color requirements, enabling flexible utilization of ink resources.
2Adaptability or versatility
If multiple spot color inks are prepared for different specified colors, then color reproduction capability is improved, but stock space is occupied and management efficiency is reduced
Solution Approach 1:
The patent applies universality by making process color inks serve multiple functions. Instead of dedicating specific spot color inks to specific colors, the same set of process color inks (C, M, Y, K) is used to reproduce multiple different specified colors by varying the mixing ratios, eliminating the need for separate spot color ink stocks.
Solution Approach 2:
The patent extracts the color specification information from the physical ink formulations. Instead of storing pre-mixed spot color inks with fixed color properties, the system extracts and stores only the color specification data, then reconstructs the required colors by mixing process color inks according to the separated color values.
3Ease of operation
If equivalent printed matter is obtained by using only process color inks without spot color inks, then stock management is improved, but printing shifts cause defective products
Solution Approach 1:
The patent implements feedback by using color measurement and evaluation to verify the reproduced colors. The color separation processing apparatus measures the actual color output and adjusts the mixing ratios of process color inks to ensure the reproduced colors meet the specified color standards, preventing printing shifts and defective products.
Data Source
AI summary
A color separation processing method includes: preparing one or a plurality of tables including a first color and one or a plurality of second colors obtained by mixing the first color with one or a plurality of added colors; selecting the table including the first color in accordance with a color sample and selecting the second color corresponding to the color sample from the selected table; and obtaining color separation values of the first color and the added color constituting the selected second color.