Here's how natural indigo is still grown and fermented in Japan, despite the fashion industry's dependence on synthetic dyes.

The remains of a four-chambered brick structure are set among black gum ... was built to process the plant when the demand for indigo dye was at its height. For 50 years, starting in the late ...

People have been wearing blue jeans for centuries. Originally, the blue color came from a natural indigo dye. The dye was chosen for the way it interacted with cotton. When heated, most dyes ...