A special formula of clay and glazes are used for rakuing.  The pieces are loaded into a kiln and fired to about 1830 degrees Fahrenheit .  When the glaze has melted the pieces are taken out of the kiln and set in the air.  This causes the glaze to crackle.  The pieces are then set in metal cans, the cans are covered and the pieces are allowed to smoke.  After the pieces are cooled they are washed and set on rackes to dry.

The raku process causes very interesting things to happen to the glaze such as color change and crackle, assuring each piece will be unique.