Molten metal, melted at 1,000°C to 1,200°C, is poured into the mold. It smoothly and evenly throughout the mold when the temperatures of both te molten metal and the mold are similar. In Joseon dynasty, copper, lead, tin, zinc, and iron were used to create alloys for the production of actual movable metal type, with copper being the principal component at around 80%. Thus, movable metal type was sometimes called movable copper type. The main components of molten metal used in the restoration of these movable metal types are copper (80%) and tin (20%).