Well, they will dye the silk threads with colour. These are the samples of colour. Mostly they use a natural dye.
So after dying the colours, they will dry it, by hanging it on a stick.
This lady here is weaving the silk cloth! She's separating the threads and colours carefully! A lot of work. She had sort of a guidance booklet in front of her, so she can determine the patterns.
Viola! This piece of cloth is done! Intricate designs right?