Science

All things related to science & technology, from Germany and beyond

A green way of coloring denims blue

May 25, 2025 • 12:00 AM

A new research study led by the University of California, Berkeley engineering Professor John Dueber has shown that indigo dye, widely used in denim to give its trademark color can be produced using "green" technology.

The current chemical process for dyeing jeans is "environmentally hazardous, not only from the chemicals required for indigo synthesis but also in the excess of a chemical to dissolve indigo to enable dyeing," says Dueber.

Indigo dyeing is an ancient technique widely used nowadays...