Kosa Silk is the heritage silk of the state of Chattisgarh. The silk made from Antheraea mylitta, an Indian silk worm, is produced mainly in Raigarh, Bilaspur, Korba and Champa districts. Kosa silk also known as Tussar silk, is known for its dull golden brown look. It is available in orange, dark honey, pale golden, cream and many other colours, which are similar to golden brown.
Compared to other silks, Kosa or Tussar is a coarse material. Because of this nature, Tussar is also used to deck up furniture and interiors. Tussar is not that shiny, but has unique softness and appeal. Tusser or Kosa is now available in a range of patterns that are block-printed or embroidered, and a variety of hues by dying its original golden shade.
The best way to identify the purity of the silk is by burning a few threads. The original thread will turn into ash and emanate some unpleasant smell, which resembles burnt hair.
It is advised to wash Kosa silk in mild detergent or shampoo. Do not dry it under direct sun. Keep it in a dry, cool place.