the textile industry uses a lot of water. That water is used for growing crops like cotton, but also for dyeing fabrics. To dye 1 kilo of textile a 100 to a 150 litres of fresh water are needed. After this fresh water is used it is given back to nature, with a little extra in the from of polluting chemicals. Dutch company Dye Coo has come up with a solution. It has developed a machine that uses CO2, a gas that naturally flows in the air, to dye fabrics.
The machine makes use of a natural law: under high pressure (250 bar) CO2 transforms from a gas to a liquid. This liquid CO2 is then used to dye fabrics with. No water needed. For now this technique can only be used for synthetic fabrics like polyester and lycra, but Dye Coo is working hard to make this technique available for natural fabrics as well.
Besides radically reducing the amounts of fresh water used for dying, Dye Coo also reuses up to 95% of the CO2. There are also economical benefits to using dry dying. Production costs are 30 to 50% lower than with normal water dying and the process is speeded up to half the time.
As we speak, two Dye Coo machines are on their way to Thailand and Taiwan, where water pollution by chemicals from the textile industry is a big problem.