saaste ja ebasoovitavate materjalide (nt liivkärn ja pinnale kinnitunud vormisegu, toitekanal ja valupea, valukraat, oksiidkest jms) eemaldamine valandilt (vt valand, liivkärn, toitekanal, valupea, valukraat, oksiidkest), process of removing contaminants and unwanted material (for an example, sand core, and residual sand on the surface from casting, riser, flash, burr, oxide scale etc) from casting (see: casting, sand core, gate, riser, flash, oxide scale)