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Gap develops foam-dyed denim ‘Dry Indigo’

Gap will roll out foam-dyed denim that dramatically reduces water, chemical and energy use. The new process, called Dry Indigo, can reduce water use by up to 99 per cent, while also using 89 per cent less chemicals, reducing energy use by 65 per cent, and eliminating water discharge when compared to the traditional slasher indigo (or sheet dyeing) process. Utilizing a foam dye that adheres to yarn, the transformative Dry Indigo technique produces a denim fabric that is comparable in hand-feel, aesthetic, performance and washability to traditionally dyed denim. The foam-dyeing technique occurs in a space of less than 65 feet — compared to the hundreds of feet that is typically necessary for a traditional dyeing machine — thereby significantly reducing energy needs.

Gap has a goal of conserving 10 billion liters of water by the end of 2020. Gap has worked closely with supply chain partners to implement numerous water-saving initiatives. In 2016, Gap introduced a smart denim wash program that has enabled the company to save over 229 million liters of water compared to conventional wash methods. Gap plans to derive 100 per cent of its cotton — across all brands — from sustainable sources by 2025. The initiative will include sourcing cotton that is organic and recycled.