This is a term used in the ceramics industry to describe a process that occurs during the firing step. The kiln is opened to enable oxygen from the air to mix with the clay and glaze components. This is especially crucial in order to “burn off” the carbon and sulfur that naturally reside in clay. Temperatures range from 1300 to 2100 degrees Fahrenheit. While oxidation occurs throughout all pottery firings, it is referred to as “oxidation burning” when it occurs throughout the whole process. The term “reduction firing” refers to the opposite consequence.