Saggar atmosphere, or concentrate the effects of salts, metal oxides and other materials on the surface of their ware. Some pots may be carefully prepared for saggar firing. One method creates a smooth surface covered with clay slip, terra sigillata, which responds particularly well to the saggar technique. This slip covering may be burnished to achieve a gloss. Prepared pots are nestled into saggars filled with beds of combustible materials, such as sawdust, less combustible organic materials, salts and metals. These materials ignite or fume during firing, leaving the pot buried in layers of fine ash. Ware produced in filled saggars
Japanese craft cultural property considered of high historical or artistic value in terms of the craft technique. The term refers exclusively to the human skill possessed by individuals or groups, which are indispensable in producing cultural property. It also took further steps: in 2009, for example, the government inscribed "yūki-tsumugi" into the UNESCO Intangible Cultural Heritage Lists. Prefectural governments, as well as those on the municipal level, also have their own system of recognising and protecting local craft. Although the government has taken these steps, private sector artisans continue to face challenges trying to stay true to tradition whilst at the same