Both natural and synthetic dyes can be used on silk, as they are very dye-friendly. The dye preference depends on the end-use in view. In synthetic dyeing, the dye colour is added to boiling water along with soap and salt. The silk yarns are then dipped several times in it for a couple of hours until the fabric grasps the colour. Once the preferred colour is achieved, the artisan removes the yarn from the boiler and washes it in clean water. Squeezing out the excess water, the yarn is then hung in columns after drying it in a dryer.