Before revision: Essentially flat objects are straightforward to cast using moulds of clay or other materials, and this technique was known in ancient China since before the Shang Dynasty of c. 1600 to 1046 BC.Department of Asian Art.
After revision: Essentially flat objects are straightforward to cast using moulds of clay or other materials, and this technique was known in ancient China since before the Shang dynasty of to 1046 BC.Department of Asian Art.