Indigo, the blue dye, was extracted from plants in ancient times, some 5000-6000 years ago (3000-4000 BCE), both in the Old (Asia, Africa and Europe) and New (Americas) Worlds. It got its name Indigo, because it reached Europe from Indus Valley, India and later from other parts of India by the Portuguese and other European sailors. It was commercially encouraged and traded by the British, firstly by the cultivation of indigo plant and production of the dye in South Carolina, USA in mid18th century, which was then a British colony. However, this stopped after the British colonies in USA gained their freedom after American Revolutionary War (1775- 1783). It was then that British East India Company (BEIC) started its production in Bengal and part of the current Bihar states of India and continued it until the second decade of 20th century. The Company looked for ways to expand the area under indigo cultivation in India. From the last decades of the eighteenth century, indigo cultivation in Bengal rapidly expanded. Only about 30% of indigo imported to Britain in 1788 was