An expendable-mold, permanent-pattern casting process in which each mold half is made of plaster of Paris (i.e. gypsum, calcium sulfate, CaSO4)-based slurry that (1) is poured over the pattern half, (2) sets, (3) is removed from the pattern, and (4) is dried at about 200 deg. Celsius; cast parts have high dimensional accuracy and good surface finish but cannot have a high melting point and therefore are usually made of aluminum, magnesium, zinc, or copper.
A) PlasterCasting
B) GypsumMolding
C) PrecisionCasting
D) ParisianCasting