buncheong ware or  punch'ong ware, is a type of celadon in grayish blue color. it is a style of korea's traditional stoneware, which emerged in the middle era of joseon dynasty. it started to lose its popularity after 16th century with the appearance of white porcelains. korea university museum owns a special buncheong ware which was a jar to contain the placenta of royal family in joseon dynasty.