Investment casting, also known as a lost wax casting, includes processes such as pressing wax, repairing wax, assembling trees, dipping, melting wax, casting molten metal, and post-treatment. Lost wax casting involves using wax to make a wax mold of the part to be cast, and then applying clay, or clay molds, to that wax mold. After the clay mold is dried, it is placed in hot water to melt the internal wax mold. The clay mold is removed from the melted wax mold and fired into an earthenware mold. Once baked. Usually, the clay mold is made leaving a pouring spout from which the molten metal is then poured. After cooling, the desired part is made.