Textile Recycling Technologies, Colouring and Finishing Methods

Deakin 
University 
(Australia) 
Production of ultrafine particles from waste denim 
and other waste textiles for subsequent denim 
dyeing or dyeing of other textiles.
166
Denim jeans and other used 
textiles 
Graz University 
of Technology 
(Austria)
 
Enzyme treatment (laccases), alternative to 
sodium hypochlorite or potassium permanganate 
used for shade reduction. 
167-169
168,169
Denim fading - Indigo shade 
reduction 
Hong Kong 
Polytechnic 
University
(Hong Kong)
 
Colour fading of reactive dyed cotton by plasma 
treatment. The process had similar colour fading 
effects when compared to conventional enzymatic 
processes, with added benefits of a shorter 
treatment time, and limited loss in fabric 
weight.
170
Dyed cotton fabrics 
Table 19: Examples of Dye Removal Processes from Textiles. 

---

Textile Recycling Technologies, Colouring and Finishing Methods | Le 
47 
4.3 Advances in Dyeing Technologies
Table 20: Developments in Sustainable Dyeing Technology
Industry Developments 
Company 
Technology 
Applied Separations 
(USA) 
Super critical CO
2
technology for dyeing polyester. 
appliedseparations.com
Debs Textile Corp. 
(Japan) 
Air-Dye: Waterless dyeing and printing process for synthetic textiles.
debscorp.com
ColorZen 
 
Cationization of cotton for dyeing (safe and efficient). 
colorzen.com
Feyecon 
(Netherlands) 
 
DyeCoo waterless dyeing process using super critical CO
2
, Drydye™ 
fabrics (polyester).