Elegant, puristic and straightforward, glass has become an essential part of
life, whether stylistically or practically. For the production of glass bodies,
a mixture of silicon dioxide, boron oxide, sodium oxide, potassium oxide and
aluminium oxide is melted in mostly electrically or gasheated furnaces at
approx. 1650 °C. The glass is formed in steel moulds on rotating blowing
machines, usually with 12 to 24 stations, until it is finally cooled in a
controlled process. This results in rotationally symmetrical, practically
tension-free glass bodies that are used as galsses and jars.