Lost-wax casting. Lost-wax casting (also called "investment casting", "precision casting", or cire perdue in French) is the process by which a duplicate metal sculpture (often silver, gold, brass or bronze) is cast from an original sculpture.
Manufacturers of casting units use investment casting method for producing complex and sophisticated components in bulk. It's a lost wax process that requires molds (made of wax) for developing castings. This method is being used by companies since years, however new additive manufacturing technology is gaining more interest of manufacturers of investment castings in India.