From the Sector

With the aim to help the denim industry reduce the environmental impact of its wastewater and move towards circularity, Archroma, G-Star RAW and Advance Denim have renewed their joint commitment to the production of aniline-free denim apparel based on Archroma’s DENISOL® PURE INDIGO 30.

Their joint aim is to produce high-quality denim in authentic blue shades without the aniline impurity carried through from the synthesis of standard synthetic indigo. In traditional denim production, this aniline remains bound with the indigo pigment on the fabric; the remaining aniline is discharged during the dyeing and washing process. This can be a problem because aniline is toxic to aquatic life and two-thirds of aniline waste currently ends up in wastewater discharge where it could potentially pollute waterways and the ocean.

Archroma developed DENISOL® PURE INDIGO 30 to answer this key challenge. A 30% pre-reduced indigo solution, DENISOL® PURE INDIGO 30 makes it possible to produce indigo-dyed denim without aniline impurities throughout the process.

Easy to use with automated dosing, DENISOL® PURE INDIGO 30 reduces the water needed for preparation, washing and wastewater treatment compared to indigo grains. It also reduces hazardous chemical consumption while allowing high reproducibility and creating the authentic and iconic deep indigo shades traditionally associated with denim.

G-Star RAW is working towards making 20% of its entire collection from Cradle to Cradle Certified® fabrics by 2025. Its partnership with Archroma and Advance Denim contributes to this goal, since the aniline-free DENISOL® holds a Gold Level Material Health Certificate from the Cradle to Cradle Products Innovation Institute. DENISOL® PURE INDIGO 30 is also compliant with other eco-standards and the requirements of leading retailers and brands.

Advance Denim, G-Star RAW and Archroma have previously collaborated to launch collections based on Archroma’s EarthColors® technology, which upcycles plant waste from the herbal industry to create sustainable colorways.

• Achievement Ahead of Schedule

All of Sateri’s five viscose mills in China are now fully compliant with the emission limits set out in the European Union Best Available Techniques Reference Document (EU-BAT BREF) on Polymers, following recent verification of Sateri Jiangsu and Sateri China mills.

Verified by independent consultant Sustainable Textile Solutions (STS), a division of BluWin Limited (UK), the parameters assessed included resource utility efficiency, wastewater discharge and air emission.

Allen Zhang, President of Sateri said, “Sateri Jiangsu was established in 2019 following an acquisition while Sateri China was built in the same year. We had aimed to have both mills meet EU-BAT’s recommended emission levels by 2023. To achieve this two years ahead of schedule underscores our continuous efforts in process improvement and control of pollutant emissions, and resource utilization efficiency. We will continue to pursue manufacturing excellence and invest in best-in-class technologies for all our mills – existing, acquired, and newly constructed ones – as part of our Vision 2030 commitment towards closed-loop and cleaner production.”

Chen Xinwei, Chairman of China Chemical Fiber Industry Association, said, "China's regenerated cellulose fibre industry has been progressing steadily in recent years. As a major viscose manufacturer, Sateri has demonstrated leadership in benchmarking itself against advanced domestic and international standards, focusing on low-carbon development, energy-saving and emission-reduction technology, and cleaner production to advance sustainable development, as well as enhance the company’s competitiveness. All other players in the industry should be encouraged to follow suit."

Sateri is a member of the RGE group of companies; Sateri’s other three mills - Sateri Fujian, Sateri Jiujiang and Sateri China (Jiangxi) - had attained EU-BAT compliance in 2020.

Rest of the Mills to Complete Assessments and Comply by 2023

Sateri’s mill in Fujian, China, has been verified to comply with the European Union Best Available Techniques (EU-BAT) standard. Verified by independent consultant Sustainable Textile Solutions (STS), a division of BluWin Limited (UK), the parameters of the standard assessed included resource utility efficiency, wastewater discharge and air emission.

In the assessment report, STS noted that all of Sateri Fujian’s mill parameters assessed were within the range of EU-BAT limits. Notably, its energy intensity, sulphur to air, and chemical oxygen demand (COD) were well under EU-BAT norms. With the use of cutting-edge technologies for air emissions control, the total sulphur recovery rate is over 98%. Sateri Fujian accounts for over 20% of Sateri’s annual total production capacity.
The compliance with EU-BAT standard comes on the back of several key manufacturing and product related industry certifications and standards which Sateri has attained. These include OEKO-TEX®’s MADE IN GREEN, STeP, and STANDARD 100. Sateri is one of the world’s first viscose producers to complete the Higg Facility Environmental Module (FEM) 3.0 assessment. Sateri is also part of the multi-stakeholder Zero Discharge of Hazardous Chemicals (ZDHC) manmade cellulose fibre working group, which is developing guidelines to reduce environmental emissions. As a founding member of the Collaboration for Sustainable Development of Viscose (CV), Sateri is supporting the development of CV’s 2025 Roadmap which considers industry best management practices and global certification standards.