Raku is a low temerature firing technique. Pieces are first bisque fired (1000degC) in an electric kiln, and decorated. Next fire them to 1000degC in the Raku kiln, let it cool slightly to 760deg, then placed into a metal container with combustables (sawdust/newspaper), and seal to prevent oxygen entering. Leave for 20 minutes. Finally the pieces are plunged into cold water and scrubbed with a scouring pad.
Many types of clay can be used, however specific raku clay creates the best result, as it has high thermal shock resistance and low shrinkage.
Only low temperature glazes can be used 800degC-100degC.
This tehnique is used for decorative ceramics, and not recommended for dinnerware, as it is not food safe.
Below is small selection of raku clay, glazes and equipment. Please look at our main categoeries for the rest of the ranges.