A kiln on the island - probably still in use judging by the fresh ash and close vicinity to the potter's bench. There are several types of kiln on the island of Ko Kret - Scorpion, and Chinese to mention two.
The pots are 'lightly' dried before consigning to the kilns where they are baked to the normal terracotta colour that is the trademark of unglazed pots the world over. The local clay - whilst being mid to dark brown upon excavation - semi-dries to a light tan, before the final firing.