The Chola bronze sculptures considered as the most refined. Why?

Chola-period bronzes were created using the lost wax technique. Although bronze casting has a long history in south India, a much larger and a much greater number of bronze sculptures were cast during the Chola period than before, further attesting to the importance of bronze sculpture during this period. It should be noted that when in worship, these images are covered in silk cloths, garlands, and jewels, and would not appear as they do outside a religious context. Decorating the bronzes in this way is a tradition at least a thousand years old as such decorations are referred to in 10th-century Chola inscriptions.