Reactive Dye Ink Set for Wider Blue-Cyan Textile Gamut
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Solution Overview
Problem
Ink jet printing technologies face limitations in achieving wide color reproducibility, particularly in the magenta-violet-blue-cyan hue range, and suffer from poor discharge stability, which restricts the production of high-quality printed fabrics with broad color fastness properties.
Innovation Solution
An ink set for ink jet printing comprising at least two colors of cyan and magenta, using C.I. Reactive Blue 15:1 and C.I. Reactive Red 245 as coloring agents, respectively, which enhances color reproducibility and discharge stability, allowing for the creation of high-quality printed fabrics with improved hue range coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional reactive dye ink sets are used for ink jet printing, then the printing process can be simplified compared to screen printing, but the color reproducible range is narrow particularly in the magenta-violet-blue-cyan hue range
Solution Approach 1:
The patent changes the chemical parameters of the dye inks by selecting specific reactive dyes (C.I. Reactive Red 245 for magenta and C.I. Reactive Blue 15:1 for cyan) with optimized molecular structures and chromophore groups. This parameter change in dye chemistry enables broader color reproducibility in the magenta-violet-blue-cyan hue range while maintaining the simplicity of the ink jet printing process
2Loss of substance
If ink jet printing is used for fiber printing, then waste liquid reduction and digitalization are achieved, but discharge stability is poor
Solution Approach 1:
The patent introduces reactive dyes as intermediaries that form covalent bonds with cellulosic fibers during the printing process. These reactive dyes act as mediators between the ink jet application system and the fiber substrate, enabling durable fastness properties and stable discharge characteristics while maintaining the environmental benefits of ink jet printing by reducing waste liquid
3Ease of manufacture
If ink jet printing is used for fiber printing, then plate making steps are eliminated and small quantity production is enabled, but print processing speed is low
Solution Approach 1:
The patent employs reactive dyes that undergo preliminary chemical activation upon contact with the fiber substrate. The reactive groups in the dye molecules are pre-positioned to form covalent bonds with hydroxyl groups on cellulosic fibers, enabling rapid fixation and reducing overall print processing time while maintaining the flexibility of digital printing
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
The ink set significantly increases color reproducibility in the magenta-violet-blue-cyan hue range while ensuring superior discharge stability, enabling the production of fabrics with enhanced color fastness and quality.
Implementation Method 1
an ink set for ink jet printing including at least a cyan ink composition and a magenta ink composition for ink jet printing performed using reactive dyes as coloring agents
Data Source
AI summary
Provided is an ink set for inkjet printing which provides a wide color reproduction range, in particular, in the hue range of magenta-violet-blue-cyan. An ink set for inkjet printing to be used in inkjet printing with the use of reactive dyes as colorants which comprises dye ink compositions of at least two colors, i.e., cyan and magenta, characterized in that the cyan ink composition contains C.I. Reactive Blue 15:1 as a colorant while the magenta ink composition contains C.I. Reactive Red 245 as a colorant.