USA HISTORY

Detailed explanation-1: -Indigofera tinctoria, also called true indigo, is a species of plant from the bean family that was one of the original sources of indigo dye.

Detailed explanation-2: -Natural indigo is obtained from a variety of plants, the most widely used one being indigofera tinctoria. This shrub grows wild and is cultivated in tropical areas throughout the world. Indigo powder-the famous blue dye-is extracted from the leaves of the indigo plant.

Detailed explanation-3: -woad, (Isatis tinctoria), also called dyer’s woad or glastum, biennial or perennial herb in the mustard family (Brassicaceae), formerly grown as a source of the blue dye indigo.

Detailed explanation-4: -The primary use for indigo is as a dye for cotton yarn, mainly used in the production of denim cloth suitable for blue jeans; on average, a pair of blue jeans requires just 3 grams (0.11 oz) to 12 grams (0.42 oz) of dye. Smaller quantities are used in the dyeing of wool and silk.