Introduction of glazed varieties of Yuan blue and white : 1, shadow green glaze: also known as blue and white glaze, used in the early and middle of the Yuan Dynasty blue and white, with domestic green material. The blue-and-white glaze of the blue-and-white porcelain at the end of the Yuan Dynasty is a derivative of the shadow green glaze, which is different from the shadow glaze or blue-white glaze of the blue and white in the early and middle of the Yuan Dynasty. Domestic green material, glazed gray or yellow, glaze layer gloss or matt wood, in addition to lack of firing technology, but also related to the higher proportion of glaze in the glaze layer. 2, egg white glaze: the end of the blue and white flowers began to use, glaze layer opacification, with domestic green material, more small devices. 3, white glaze: from the middle of the 14th century to the beginning of the year, using imported green material. The glazed white is pan-green, and the glaze is water-green. It has just the right transparency, brightness and color, which can better set off the expressive power of blue and white. Yuan Qinghua is generally unglazed at the bottom except for the jade pot spring bottle. There are glaze spots of different sizes and shapes at the bottom. The high-foot cup has a wide and narrow glaze mark on the inner side of the high foot. The inner side of the bottle of fine bottle such as plum bottle is along the lower body. The inner wall of the large tank is glazed by the glazing method. The inside of the lid is a solid tire, light yellowish, see fine glaze. Hexagon Ball Valve,1Pc Hexagon Ball Valve,Hexagon 1Pc Ball Valve,Hexagon Thread Ball Valve Wenzhou Dico Valve Technology Co.,Ltd. , https://www.dicovalves.com