WANG Enyuan 1, XIONG Yinfei 1, WU Jingwei 1, GONG Yuwu 1, WANG Jianwen 2
(1. Shanghai Museum Conservation Center, Shanghai 200003, China; 2. Shanghai Museum Archaeology Department, Shanghai 200003, China)
Abstract: Samples of different porcelain wares such as Tingxi ware and Dongzhang ware, etc. excavated from Qinglong Town were tested by EDXRF, SEM and polarizing microscope. Specimens of Jian ware, Deqing and Longquan wares were also tested for comparison. The results show that crystallization glazes of ancient times can be divided into three types: 1. iron oxide crystals on the glaze surface; 2. calcium feldspar crystals in the middle of the glaze layer which is close to the glaze bubble; 3. crystallization in the junction of the glaze and body. Disorderly anorthite crystallization of Tingxi ware and imitated Longquan ware is similar to the microstructure of Longquan ware, which resulted in the distinctive visual effect of ‘crude Longquan ware’.
Key words: crystallization glaze; iron oxide crystal; calcium feldspar crystal; Qinglong Town