Duan clay straight wall cup. Standard shape. Decorated with single line on the edge. The combination of Ben Shan Lu Ni(green clay) and purple clay is used to produce (Duan Ni)when mixing together. This kind of mud needs very high fire temperature during pot production and it is a very difficult process compare to the production of other pots using different kind of clay. The color of this clay is generally beige after putting into fire. Its base color is partial white, slightly dull with black and reddish particles in it.