Chenghua porcelain: identification technology

The sand bottom of Chenghua porcelain is brown, commonly known as "rice paste bottom"

Chenghua porcelain has regular tire repair and chipper (bottles and jars are called chippers). Because it is cut and molded, tire contact marks can be seen in the abdomen. During Chenghua period, because of the good technology, chippers such as bottles and jars are not obvious. Plates often collapse, and the bottoms of bowls and plates are straight and high. There are two kinds of blue and white porcelain in the official kiln: bottom glaze and sand bottom. Mostly glazed, the glaze color of the bottom is the same as that of the blank, and the sand bottom is brown, commonly known as "rice paste bottom" (Figure 14). It is moist, smooth and free from roughness, which is the unique style of Chenghua official kiln. The foot wall at the bottom of the appliance is narrow and the foot ridge is round; Yellow overflow can be seen at the exposed tire; The inner glaze and bottom glaze of the utensils are smooth and delicate; The outer wall of the foot is mostly surrounded by two or three strings, one at the top and two near the bottom of the foot. The circle line near the foot root is deeper and the top is lighter.

Note: the bottom glaze is over-fired, and there is no glaze at the bowl mouth, that is, "mangkou"