Chola bronze statues were made using the "lost wax" technique. First, an image was made of wax. This was covered with clay and allowed to dry. Next it was heated, and a tiny hole was made in the clay cover. The molten wax was drained out through this hole. Then molten metal was poured into the clay mould through the hole. Once the metal cooled and solidified, the clay cover was carefully removed, and the image was cleaned and polished.