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Yixing clay () is a type of clay from the region near the city of Yixing in Jiangsu Province, China. Its use dates back to the Song dynasty (960–1279) when Yixing clay was first mined around China's Lake Taihu. From the 17th century on, Yixing wares were commonly exported to Europe. The finished stoneware, which is used for teaware and other small items, is usually red or brown in color. Also known as ''zisha'' () ware, they are typically unglazed and use clays that are very cohesive and can form coils, slabs and most commonly slip casts. These clays can also be formed by throwing. The best known wares made from Yixing clay are Yixing clay teapots. ==Types== ''"Yixing clay''" is often used as an umbrella term to describe several distinct types of clay used to make stoneware: *''Zi sha'' or ''zi ni'' (紫砂 or 紫泥 ; literally, "purple sand/clay"): this stoneware has a purple-red-brown color. *''Zhu sha'' or ''zhu ni'' (朱砂 or 朱泥; literally, "cinnabar sand/clay"): reddish brown stoneware with a very high iron content. The name only refers to the sometimes bright red hue of cinnabar. There are currently 10 mines still producing zhu ni . However, due to the increasing demand for Yixing stoneware, zhu ni is now produced in very limited quantities. ''Zhu ni'' clay is not to be confused with ''hong ni'' (红泥, literally, "red clay"), another red clay. *''Duan ni'' (鍛泥; literally, "fortified clay"): stoneware that was formulated using various stones and minerals in addition to ''zi ni'' or ''zhu ni'' clay. This results in various textures and colours, ranging from beige, blue and green to black. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Yixing clay」の詳細全文を読む スポンサード リンク
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