Clay cookware and kitchen ware are all made with a mixture of red clay and river mud for strength and longevity. The potter will create his pot and leave it in sun light to dry up a bit. Then he mixes the red clay with water making a watery paste. Then using a cloth, this paste is applied all over the pottery. Then it is allowed to dry in sun light again. This process is done for up to three to four times before the pottery is baked in a kiln for the final output.
This method of applying a paste makes it stronger, more finished and easier to clean and cook with.