How Mangalagiri cotton was made?

Mangalagiri cotton is produced by the cotton yarn purchased from factories. This cotton thread is then boiled in water and caustic soda for a few hours before it can be dyed. If the yarn is to produce sarees of white color, it is bleached before weaving, otherwise for coloring, chemical dyes are used. After dyeing, the yarn is then dried in the sun before it is ready for the weaving process.