Raku is a style of firing pottery that originated in Kyoto, Japan in the late sixteenth century. The pieces are taken red hot from the kiln, glazes molten, and reduced (smoked) in combustible materials such as hay, paper, sawdust etc. then often quick cooled in water. The process results in decorative pieces vibrant with energy and fire. Surfaces can be varied and unpredictable in colour and texture, ranging from brilliant metallics to muted tones, perhaps enhanced with patterns of crackle. Clay surfaces are black where unglazed. Raku is strictly for ornamental purposes and is normally purchased for its aesthetic beauty.