üks piirdeainete eriliik peenpulbri (grafiit, talk, likopodium jms) kujul vältimaks vormisegu kleepumist valumudeli külge ning kergendamaks vormipoolte teinetesest eraldumist vormimisel (vt piirdeaine), powder preventing the casting sand sticking to the pattern and allows the pattern to be more easily removed from the sand as the mold is made; also used to ensure that two halves of the mold are easily parted (see: parting compound)