The lost-wax method of casting glass, which dates back to the pharaohs of ancient Egypt, involves 40 to 50 separate stages. Works produced using this method are prone to cracking during the cooling process due to the different rates at which various parts of the article cool.
脫臘鑄造法始於古代的埃及皇室，每件作品往往必須經過四十到五十道過程才能完成，而在徐冷的過程中，又因為作品每個部位的大小不同，容易產生斷裂。