The glass was discovered 3500 BC back...the first true glass was made in coastal north Syria, Mesopotamia or Ancient Egypt..... Glass is made by melting together several minerals at very high temperatures. Silica in the form of sand is the main ingredient and this is combined with soda ash and limestone and melted in a furnace at temperatures of 1700°C. Other materials can be added to produce different colours or properties.Glass is manufactured by melting sand, soda ash, dolomite and limestone together to produce a 3660mm wide continuous ribbon of glass. This flows from the furnace and ‘floats’ the glass over a bed of molten tin. It is then carefully cooled to anneal the glass – a process which modifies the internal stresses enabling it to be cut and which maximises its potential mechanical resistance. The float line glassmaking process, is a continuous process .....
1 5 1