A plaster, lead, or forged alloy sample taken from new The metal blocks into which forging impressions are machined and from which forgings are produced. to verify accuracy by (1) Transferring drawing or sketch dimensions to templates or dies for use in sinking dies. (2) A detailed inspection operation in which significant dimensions of a forging are checked against blueprint specifications. and precise measurement. See also Any reproduction of a die cavity in any material, frequently lead, plaster or epoxy, used to confirm the exactness of the cavity. See Die Proof..