An independent mill trial in India has shown that Livinguard's +DYE SC after-treatment cuts reactive-dyeing wash-off water consumption by 32% and processing time by 23%, while dropping combined utility costs from US$0.34 to US$0.10 per kilogram of fabric.

Swiss textile technology firm Livinguard commissioned the assessment through Fashion for Good's Advanced Processing Matrix initiative, with technical consultancy BluWin conducting trials in June 2026 at a knitwear processing mill in India. The demonstration shortened the conventional nine-stage wash-off sequence after reactive dyeing of cotton to six stages.

The most striking figure is steam: consumption fell by up to 88%, from 4.47 to 0.54 kWh per kilogram. Calculated greenhouse gas emissions dropped 29%, and electricity use fell 23%.

What changes on the mill floor?

Reactive dyeing of cotton and other cellulosics requires extensive washing and soaping to remove hydrolysed dyes that fail to bond permanently with the fibre. These steps often run at high temperature and account for a substantial share of the water and energy consumed in dyeing.

+DYE SC is a cationic after-treatment that binds to both the fibre and the hydrolysed dye, forming a charged, crosslinked network that restricts dye release during subsequent washing. That allows the wash-off sequence to shrink while maintaining colour fastness.

Crucially for cost-sensitive mills, the trial required no machinery modifications. The Indian mill's existing sequence — two soaping baths at 95°C plus hot washes at 80°C and 90°C — was replaced with six stages including a single warm wash at 60°C, using the mill's own equipment, recipes and dyestuffs.

The measured results from the trial:

• Water: 37.44 litres per kg down to 25.33 litres per kg (-32%)
• Processing time: 5.72 hours down to 4.42 hours (-23%)
• Steam: 4.47 kWh per kg down to 0.54 kWh per kg (-88%)
• Combined water, effluent treatment, steam and electricity cost: US$0.34 per kg down to US$0.10 per kg

How robust is the data?

The assessment used a 15kg sample dyeing machine processing knitted cotton in a dark shade, with results adjusted to reflect the liquor ratio used in bulk production. Wash and rub fastness matched conventional processing, and additional laboratory testing across four shades confirmed required fastness standards held.

The findings nevertheless come from a demonstration-scale assessment, not extended commercial production. Actual savings will depend on shade depth, washing sequences, machine insulation and local utility costs. The cost estimates exclude chemical costs and machine time — although Livinguard says the treatment is priced to be cost-neutral in chemical terms because it replaces conventional soaping and fixing agents.

Livinguard sees the strongest case in medium and dark shades, where conventional wash-off sequences run longer and consume more resources. Shorter cycles also raise throughput on existing machines, effectively adding capacity without capital investment.

"Collective efforts to reduce the environmental impact of textile production are losing pace in a difficult economic environment," said Michel Waegli, global head of business development at Livinguard Technologies. "Livinguard +DYE SC changes the equation for manufacturers. It improves their cost competitiveness and reduces resource use at the same time, on the equipment a mill already has."

What happens next?

Fashion for Good plans to share the findings with its brand and manufacturing partners to support further adoption. Livinguard, headquartered in Pfäffikon, Switzerland, is now working with mills in Turkey, India, Pakistan and Sri Lanka to implement the technology — a rollout that will test whether demonstration-scale savings hold in bulk production.