Inkjet Ink Set for Decorative Panels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Analog gravure printing for decorative panels is costly and time-consuming to switch between designs due to the need for new cylinders and ink formulations, and digital inkjet printing can cause metamerism and adhesion issues when transitioning from analog to digital, especially with excessive ink load during lamination.
Innovation Solution
A set of inkjet inks comprising cyan, yellow, and black pigments, with specific red pigments (e.g., C.I. Pigment Red 144, 254, 176) that reduce metamerism and ink consumption, and a two-tiered black ink system with varying pigment loads to enhance color gamut and adhesion, used on a paper substrate for decorative panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital inkjet printing with CMYK inks is used to enable flexible design switching, then adaptability improves, but metamerism issues and adhesion problems occur due to excessive ink load
Solution Approach 1:
The patent changes the pigment composition parameters by replacing magenta with red and adjusting pigment particle sizes to below 300nm, which modifies the ink's optical and adhesive properties to reduce metamerism and improve lamination adhesion
Solution Approach 2:
The patent applies different pigment characteristics to different color channels (cyan, yellow, red, black) with specific particle size ranges optimized for each, creating locally optimized ink formulations that collectively solve the adhesion and metamerism problems
2Manufacturing precision
If higher pigment load is used to correct metamerism effects, then color accuracy improves, but adhesion issues worsen during lamination
Solution Approach 1:
The patent optimizes the pigment load parameter to a specific range (2-7% by weight) and controls particle size below 300nm, achieving a balance where sufficient pigment is present for color accuracy while maintaining adequate adhesion properties for lamination
3Adaptability or versatility
If traditional CMYK ink set is used for broad color gamut, then color versatility improves, but metamerism between analog and digital printing worsens
Solution Approach 1:
The patent modifies the color model parameters by substituting magenta with red pigments and adjusting the spectral characteristics of each ink, thereby reducing metamerism while preserving broad color gamut capability for both wood and stone decors
Solution Approach 2:
The patent uses composite pigment formulations combining multiple pigment types with complementary spectral properties to achieve consistent color reproduction across different lighting conditions and printing methods
Data Source
Figure 1~3
Figure 4
AI summary
A set of inks for inkjet printing on a paper substrate, for example a paper sheet for being used in laminated panel, preferably floor, wall or furniture panels, said inks being pigmented inks, wherein said set of inks comprises: a cyan ink, a yellow ink, at least a red ink and at least a black ink.