Archroma unveils aniline-free denim indigo dye

Archroma, a global leader in colour and specialty chemicals, has unveiled an aniline-free denim indigo dye. The new dye provides a non-toxic way to produce the traditional, iconic indigo blue that consumers associate with denim and jeans.

Currently, aniline impurities are an unavoidable element of producing indigo-dyed denim. Unlike other chemical impurities, aniline is locked into the indigo pigment during the dyeing process and therefore cannot be washed off the fabric.

Scientific testing has shown that aniline impurities are toxic to humans, causing skin allergies, damage to major organs and genetic defects, as well as being linked to cancer. Aniline is also toxic to aquatic life, which is an issue as two thirds of the 400 metric tons of aniline waste on an annual basis ends up in the environment as wastewater discharge. The toxic chemical is therefore starting to feature on the restricted substance lists (RSL) of some major clothing brands and retailers.

The Denisol Pure Indigo 30 dye is the latest in a long line of sustainable innovations for denim started in 2009. That year, Archroma introduced its ‘Advanced Denim’ technology which uses up to 90 per cent less water during the dyeing process. For designers and brand owners who long for authentic indigo inspiration, the new Denisol Pure Indigo 30 now also makes it possible to produce indigo-dyed denim without high levels aniline impurities. Archroma will make the Denisol Pure Indigo 30 dye in the most sustainable way as possible.