Despite passed more than 2,000 years, the blue dyed cotton cloths, masterpieces of the craftspeople in the Han Dynasty (BC206 - AD220) still lie quietly in a tomb in Xinjiang, Uygur Autonomous Region.
Natural indigo-dye has a long history in China, dating back to the Qin and Han Dynasties (BC 221-220), and indigo-dyed cloth had been used as a main material for clothes for at least 1,000 years.