A special mix of clay is formed into pancakes and used to stilt the pots off of kiln shelves and away from other pieces when loading a kiln. Without these ‘wads’ the firing would fuse the pots to any surfaces they touched. Where these wads are applied to the pots, the surface is protected from effects of flame and wood ash. An artist can use these wads to intentionally ‘paint’ the surfaces of their work. These areas of resist often create a strong visual contrast on the surface of pieces. Because flame and ash move from firebox to flue marks resembling currents of a river around a stone are often recorded.