A ceramic-making method, it is an ancient Japanese technique defined by the process of rapid heating and cooling. It dates from the 15th century when tile makers discovered they could be more productive if they removed hot objects, made from clay, with tongs and cooled externally rather than letting them cool slowly in the kiln. The method evolved to be used for the production of everyday objects as well as fine art expression.<br><br>Porous low-fired ceramic ware characterized by deep, subtly changing colors.(pr. ra-KOO)

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