Say what? Yes, I’m talking about the industrial process of coloring textile with dye. This is normally done with a lot of water. Actually the textile industry is believed to be one of the biggest consumers of water. On average an estimated 100 kg of water is needed to process 1 kg of textile material. By using supercritical Co2, no water is needed. When carbon dioxide is subjected to pressure it becomes “supercritical” and has liquid properties while remaining in a gaseous state. This makes it very suitable for processes from dyeing textile to decaffeinating tea.
This process is developed at the Delft University of Technology and being rolled out commercially by DyeCoo. A friend of mine works at the university and told me about this. I love these kinds of innovative technologies which can bring so much environmental and energy advantages. It uses no water, only 20% of the energy consumption and in 50% of the time. Read more.