üldnimetus täppisvalandite tootmise protsessidele kordkasutusega tervikvormides; need saadakse kordkasutusega (kergsulavatest, lahustuvatest või gasifitseeruvatest materjalidest) valumudeleid kasutades (vt kordkasutusmudel), casting metal into a mold produced by surrounding, or investing, an expendable pattern with a refractory slurry coating that sets at room temperature, after which the wax or plastic pattern is removed through the use of heat prior to filling the mold with liquid metal (see: expendable pattern)