Raku ware, 楽焼, raku-yaki, is a type of Japanese pottery is traditionally used in Japanese tea ceremonies, most often in the form of chawan tea bowls. It is traditionally characterized by being hand-shaped rather than thrown; fairly porous vessels, which result from low firing temperatures; lead glazes; and the removal of pieces from the kiln while still glowing hot. In the traditional Japanese process, the fired raku piece is removed from the hot kiln and is allowed to cool in the open air. The familiar technique of placing the ware in a container filled with combustible material is not a traditional Raku practice. Raku techniques have been modified by contemporary potters worldwide
AloJapan.com