RAKU Terminology

Clay Body
The ingredients that make up the clay and the characteristics of the mix.

An ancient Japanese method of clay shaping, glazing and firing. Originally the only shape used for raku was the tea bowl. Now days anything goes. During the firing process the objects are removed from the kiln molten hot and then placed into a reduction nest to cool and obtain its unique smokey black claybody color and glaze crackles or flashes of metalic colors and patterns from the nest material and glaze ingredience.
Reduction Firing
During the firing process the fuel/air ratio is high, the feul is not totally consumed. Sometimes causing billows of smoke to roll out of the kiln.
Reduction Nest
The final step for the Raku process. Used to further reduce the glaze by pulling the metal oxides to the surface. Causes the clay body to turn black and creates unpredictable flashes of metalic colors and sheen in the glaze. Filling the bottom of a galvanized garbage can with paper, leaves, fabric or wood shavings, provides a reduction nest for the molten hot pieces to be set into after being pulled, still red hot, from the kiln. The lid of the can is closed until the piece(s) cool, causing a severe reduction atmoshere (no oxygen).