Zhu Ni is a kind of mud belonging to purple sand red mud. Zhu Ni is a fine product in red mud. Because its main component is red mud (with high iron content), it is also produced in the lower layer of tender mud mine, so it is also called "stone bone that can't be blown by the wind". Stone bone refers to an incompletely weathered clod, which is as hard as a rock, but will collapse when it meets water. Juni mine has obviously decreased. But one principle remains unchanged, as long as there is red mud, Zhu mud will not die.

Difference:

There are essential differences between Zhu Clay Pot and Zisha Pot. From the analysis of finished products, the crystallinity of Zhu Tao jar is much higher than that of purple clay, and the firing shrinkage is also higher than that of purple clay by more than 80%.

Due to the large shrinkage, the surface of the pottery pot will be more or less wrinkled after firing. After long-term use, these wrinkles can only be seen, but can't be touched by hand, so there is a saying among pot players that "no wrinkles make no ink".

Refer to the above? Baidu Encyclopedia-Zhu Ni