In Eastern parts of India, flat gongs made from bronze are called using various terms. In Orissa and West Bengal, they are called kansar derived from the Sanskrit term kamsya meaning bronze or bell-metal. Some literary references can also be found about gongs among the ancient literature of India. In an economic treatise Arthshastra written during the Maurya dynasty, it is mentioned that kamsa-tala or bronze gongs were manufactured by the workers using different proportions of bronze alloys. Rasaratnasamuccaya, the 12th century alchemical text and Cilappattikaram, a Tamil classic, document gongs as kamsya or kancam meaning flat gongs manufactured using bronze alloy.