THERMAL EXPANSION
ca: EXPANSIÓ TÈRMICA
Thermal expansion is the relation of volume and size of ceramic material to temperature. The more it expands during heating, the more it contracts while cooling down. When firing clay, sculpture or work in relief where one piece has differing thicknesses, the change in temperature must be slow so the expansion and contraction are not too abrupt; a thin part will heat up and cool down much quicker than a thick part.
