Furnace glaze is a kind of low-temperature glaze newly created by Jingdezhen Royal Kiln Factory in the Qing Yongzheng period, which prevailed in the Yongzheng and Qianlong periods. This glaze is applied to porcelain tires and also to Yixing purple sand tires.
The glaze of the furnace is mainly composed of vertical stripes of different lengths on the glaze surface of the utensils, some curved, some vertical, and some like mountain clouds mixed with spots, covering the body. There are two kinds of "plain furnace uniform glaze" and "hun furnace uniform glaze".
The glaze of the stove is blue-green with a blue-green dot pattern, and the jadeite (pastel pigment colored with copper oxide) is sprayed on the bottom of the blank, and the face is sprayed with guangcui (pastel pigment colored with cobalt oxide). The glaze of the furnace is red and green with a hemp dot pattern (red glaze is colored with colloidal gold). Fired at about 800 ° C, the glaze contains powder, so the glaze is thick and opaque.
The Qing Dynasty wrote the "Notes on the Southern Kiln": "The furnace is the same kind, which is burned in the furnace, and it is better to have red dots in the color flow, followed by green dots." ”
The purple-like color of the mature sorghum spike on the glazed porcelain of the Yongzheng period is called "sorghum red".
Wang Nanlin, a potter of the Qing Dynasty, has the "Plain Body Round Qing Jug" passed down. He prides himself on being a descendant of Lu Yu in the Tang Dynasty, one of the purple sand masters, and is good at making tea pots and other sand utensils. The shape is deliberately ancient, based on Shang, Zhou, Qin and Han bronzes, engraved quaint and exquisite, and the structure of the pieces is symmetrical.
The "History of the Development of Yixing Ceramics" records that Wang Nanlin was good at making purple sand tea pots, skilled in craftsmanship, and created purple sand "furnace jun" glaze decoration.
After the glaze is fired, the glaze of the furnace melts into purple, blue, green, moon white and other colors, and the colors are colorful and colorful.