Question

How was indigo introduced?​

Answer 1

Answer:

Indigo got its name because of its origin in the Indus Valley, discovered some 5,000 years ago (or circa 3000 BCE), where it was called nīlā, meaning dark blue and by the 7th Century BCE, people started using the plant for producing the blue dye (Kriger and Connah, 2006).

Answer 2

Explanation:

Natural indigo was used until the invention of synthetic indigo. Natural indigo in India was made like this: cut plant is tied and placed in the vats made of brick lined with cement. ... Color of the mass changes into green, then blue and then into the indigo. Mass settles to the bottom of the vat and is then extracted.