China, Deqing kilns
Eastern Jin dynasty (AD 317-420)
Museum no. FE.9-1972
The potters in Deqing originally made fine green-glazed stoneware. After 300, they also began to use black and dark-brown glazes, probably inspired by black lacquer. These were the first in China's long tradition of dark-glazed ceramics.
The new colours were achieved by using an iron-rich clay for the glaze, or by adding iron to the glaze mixture already used for the green wares.