Dye manufacturer DyStar introduces a salt-free dyeing solution for the denim industry.

The Singapore-based company launched Cadira Denim last week, a dyeing process that combines DyStar Indigo Vat 40% Solution with the ecological reducing agent, Sere Con C-RDA.

Touted as the “cleanest indigo on the market,” DyStar Indigo Vat 40% reduces sodium hydrosulfite usage by 60 to 70 percent and results in cleaner waste water and less water usage. This combination allows denim manufacturers to achieve salt-free dying with a strong effluent load reduction.

DyStar reports that Cadira Denim reduces the amount of sulfates up to 95 percent and decreases Chemical Oxygen Demand up to 80 percent, compared to dyeing with indigo powder and the conventional reducing agent Hydrosulfite. Total solids can be reduced up to 90 percent.

Additionally, the process reduces waste from from effluent treatment plants because no additional salt is created.

Cadira Denim is the sixth program in DyStar’s range of Cadira products designed to reduce the apparel and textile industries’ water, energy and waste consumption. The first concept, Cadira Reactive, launched in Spring 2016, followed by Cadira Polyester, Cadira VAT, Cadira Recycled Polyester and Cadira Wool.

DyStar says it will provide additional concepts for more resource efficiency and productivity in the textile production.

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