- Purple Mud( Zi Ni)（紫泥）
Purple mud is located in the middle and lower part of the mine, and its output is very rare. Its color is natural purple, its texture is delicate and warm, and its color is dignified and strong after firing, with a warm and simple color. Due to the relatively high density of purple clay, it can be used for firing large utensils. The surface of the finished product is smooth and easy to shape.
Purple mud is actually a relatively broad term. Raw ore purple mud without adding other raw materials can be called purple mud. According to different refining methods, purple mud can also be divided into Raw Ore Purple Mud, Pure Mud and Purple Clay of Bottom Layer. These are also several common terms for purple mud.
- Raw Ore Purple Mud (Yuan Kuang Zi Ni)（原矿紫泥）
After the mud is mined from the ore layer, the raw ore purple mud can be obtained after refining. The raw ore purple mud belongs to the category of purple mud.
The raw ore purple mud is rich in iron elements and mostly presents a purple-brown color. Raw purple clay is uniform in texture, and can be fired into vessels with perfect shape and delicate texture. Compared with other clay materials, raw purple clay is more malleable and gives people a grand and classical feeling.
At that time, due to the high iron content in the veins, the teapots produced would have fire defects and small melting points. The large particles contained in the mud had a loose structure and a double-pore structure. The special double-pore structure was given to Yixing Zisha teapot. , fast temperature transmission and strong heat preservation, which is beneficial to maintain the temperature of water and the color, fragrance and aroma of tea when making tea.
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