Longquan celadon glaze crack.

The water crack of Longquan celadon glaze is a common defect in ancient ceramics. Ancient ceramic glaze is a mixture of mineral components and organic matter. In the process of high temperature firing, this mixture will decompose and change, resulting in cracks on the surface of fired ceramics, which is Longquan celadon glaze water crack. There are several main reasons for the water crack of Longquan celadon glaze: first, the oxide content in clay is too high; Second, decarbonization is not good; Third, improper firing temperature; Fourth, the firing time is too long. In order to prevent the water crack of Longquan celadon glaze, we should first use high-quality clay, then control the firing temperature, and the firing time should not be too long, and finally carry out reasonable decarbonization treatment.