GLASS AND WHAT IT IS MADE OF
Glass is a natural product. Its most important raw materials are quartz sand, lime and sodium carbonate. To manufacture its glass products, we however use primarily recycled glass - depending on the color, up to 55%.
THE MELTING PROCESS
The recycled glass, with the addition of new raw materials, is melted down at a temperature of 1'580°C. The most important source of energy for this process is natural gas.
MOLDING GLASS
Glowing-hot drops of lass, cut off from the continuously flowing mass of molten glass, are channeled through a gutter into the preliminary, or parison, mould. In the final mould, the preformed glass is given its definitive shape by adding air pressure.
ANNEALING
The moulded bottle - still glowing red-hot - is then slowly and uniformly cooled off in the annealing oven, with adjustments made for any material imbalances. With a surface finishing process, the containers are given some additional protection from scratches, and their resistance to breaking is also improve