DyStar and RotaSpray are announcing a saltless dyeing solution for the denim industry. This new technology is awarded important ECO certificates and offers high flexibility for dyeing small lot sizes, reduced water usage and effluent discharge lower impact on yarn in the dyeing process and simplified recipe changes.
The companies developed their indigo spray dyeing procedure for production on a bulk level, which allows denim producers to significantly reduce their environmental impact, according to the manufacturers.
The new Spray dyeing technology combines DyStar Indigo Vat 40% Solution, Sera Con C-RDA organic reducing agent and the optimisation of spraying parameters of the EPO patented RotoDyer and the RotoCoater spraying technology. Although rotary atomisers have been established for several decades in the textiles industry, they were mainly used for rewetting textiles with moisture. But recent cost pressure and a global demand for more sustainable solutions were motivators for the R&D of the industry and led to the recent technology leap.