Porcelain is made of three raw materials: china clay, feldspar, and quartz. They are mixed in a proper ratio to make porcelain mass which is then poured in moulds or processed to make vessels on turntables. The objects are then heated at 900°C for almost 20 hours. Porcelain gets the shiny glaze from alumina, silica, or calcia slurry, and is heated again at 1300°C.
This makes porcelain very hard and durable.
