Raku is a traditional type of Japanese pottery. The kiln is heated very fast and the work is removed when red hot. It is then quickly immersed in a combustible material to create crackles in the glaze, bright colours and metallic flashes.
Raku firing creates purely decorative pots. While this technique does not achieve high enough temperatures to make the clay waterproof, Raku firing does create some of the most exciting, varied and unpredictable finishes in the world of ceramics.