Technology
Art of Waterless, Hues of Nature
Traditional Dyeing Process
Traditional dyeing requires a large amount of water and industrial salt. After dyes, salts and chemicals dissolve in water, a great quantity of dyeing wastewater will be generated.
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High water consumptionApproximately 120 tons of water per ton of yarn -
High color content in wastewaterNearly 40% dyestuff being wasted -
High salinity in wastewaterApproximately 400 kilograms of salt per ton of yarn -
Difficult to treat wastewaterHigh environmental pollution
The root cause of high pollution in the textile dyeing industry
lies in the use of water as the dyeing medium
ECOHUES™ Waterless Dyeing Technology
A new type of environmentally friendly dyeing technology that uses nearly 100% recyclable non-aqueous medium instead of water for reactive dyeing. It can be widely applied to products made of cellulose fiber and achieves dyeing with zero water, zero salt, and nearly zero wastewater discharge, significantly reducing the environmental burden.
1.
Pretreatment
Less water
2.
Solvent dyeing+Drying
ZERO WATER FOR DYEING
3.
Fixing+Softening
Less water
Water saving amount can be up to 95% when compared to conventional dyeing for the entire process
* The data is sourced from SGS certification report, with navy blue cotton yarn as the reference. There may be variations in the data for different colors.
FAQS
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What's the dyeing mechanism of ECOHUES™ Waterless Dyeing Technology?
Due to the absence of water in the ECOHUES™ dyeing process, the technology effectively avoids the hydrolysis of dyes, achieving efficient and high-quality dyeing. Moreover, the altered dyeing mechanism eliminates the need for dyeing promoters, achieving salt-free reactive dyeing. Currently, the fixation rate with ECOHUES™ technology exceeds 97% (compared to an average fixation rate of around 60% for conventional water-based dyeing), significantly improving the utilization rate of dyes. ECOHUES™ technology also eliminates the soaping process after dyeing, greatly saving water usage, simplifying and shortening the dyeing process, improving dyeing accuracy and the first-pass yield of dyeing. -
Does the ECOHUES™ Waterless Dyeing Technology completely avoid the use of water during the dyeing process?
The complete water-based reactive dyeing process includes pre-treatment (removing impurities such as wax and pectin), dyeing (coloring), post-treatment (rinsing), and finishing (fixation and softening). Substantial amount of water is used in coloring and rinsing/ washing processes of dyeing.
ECOHUES™ technology does not use any water during dyeing (coloring) and thus eliminates the need for post-treatment (rinsing). For the medium to dark colors, pre-treatment (removing impurities) is generally not required as well with ECOHUES™, significantly reducing the water consumption. Only a small amount of water is required, for adding alkali and finishing processes (fixation and softening), which can be recycled. -
Are there any limitations to the material and dyeing forms？
ECOHUES™ Waterless Dyeing technology can be applied to materials that are traditionally dyed using the reactive dye system. This includes cellulose fibers such as cotton, linen, viscose, and more.
The technology is suitable for various dyeing forms, including fiber dyeing, yarn dyeing, fabric dyeing, and garment dyeing. At present, our first industrial scale equipment primarily focuses on coned dyeing for cellulose yarn.
