Novel waterless dyeing solution for cellulosics
07/06/2024
Exponent’s patented Ecohues process is based on a non-aqueous solvent that is used as the dyeing medium for reactive dyes. The solvent is 99.8% reusable, the company says, does not require salts, and nearly removes the need for soap washing after dyeing. It can thus lead to savings in water, energy and time, as processing duration is 6 to 8 hours, and colour fixation rate is 97%.
With manufacturing partner Cobalt Fashion, based in Hong Kong, the Ecohues process has been used to dye Tencel branded lyocell and modal fibres and Ecovero-branded viscose, which the Austrian group points out, are all certified EU Ecolabel.
Image courtesy of Lenzing
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