Heating pottery or sculpture in a kiln or open fire, the purpose is to harden the clay permanently and fuse the enamel to the piece. The temperature needed to mature the clay varies with the type of body used. Source: Ralph Mayer, "A Dictionary of Art Terms and Techniques"<br><br>Exposing to heat in a kiln a clay body to harden it (see Terra cotta) or an investment casing containing wax so as to "lose it" which is an integral part of the lost-wax process . See Foundry.<br><br>A process of applying heat to make hard pottery in either an oven or an ovenlike enclosure called a kiln. Also the means of fixing colors to ceramic surfaces.Also see glaze, polymer clay, pyrometric cones, and temperature.