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Firing is the process of baking clay products in a high temperature oven.

Glaze firings reach the maturity temperature for the clay body being fired.  This varies depending upon the type of clay and can be anywhere from 1600 to 2400 degrees F.   The clay being fired does not have to be glazed to be fired in a glaze firing.

Glaze is a combination of chemicals and minerals formulated to melt and become  a glass coating when applied to clay products and fired to the proper temperature.
Glaze formulas must contain silica, alumina, and flux .  Colorants in the form of metal oxides are added to give the glaze color.