Physical artifacts and written records can only be traced back to the Qianlong period of the Qing Dynasty, with works by Wang Nanlin, Yang Youlan, and Shao Jizu. *The Yangxian Minghu Xike Tu Kao* records "original colors with added five-color floral decorations, extremely refined and skillful." This was because during the Kangxi, Yongzheng, and Qianlong periods of the Qing Dynasty, the painted porcelain of Jingdezhen reached its peak. Purple clay colored glazes were actually a conscious imitation of porcelain's famille rose decoration, leading purple clay and porcelain decorative styles down a path of achieving the same effect through different means. ## Glazing Technique The nature of the glaze belongs to sodium-containing fusible glazes (also used as decorative painting materials). The preparation process involves first firing the glaze materials into frit, then mixing and finely grinding before use. The glaze layer or painted decoration is applied to already biscuit-fired products, placed inside saggars for firing, with a firing temperature of 800°C to 900°C. The sodium-containing fusible glaze used for purple clay differs from lead-containing fusible glazes because the raw materials used are different. The base materials are locally sourced, and the glaze has good covering properties. Because the purple-red color itself is quite dark, it requires both good coverage and a bright glaze surface. For fully glazed products, due to slight differences in the expansion coefficients between the clay body and glaze surface, a network of crackle patterns forms after removal from the kiln. Therefore, general descriptions state that Yixing purple clay's "furnace Jun" glaze imitates the crackle glaze of Song Dynasty Ge ware. As a type of ceramic decorative glaze for identification purposes, it indeed possesses an antique charm, forming its own distinctive style. --- *(Published in 1991, Yixing Purple Clay)*