Catalogue of Luminaires 57

From fire to light
Sand. – Nature has provided us with sand in inexhaustible abundance.
Glass is molten sand. Pure and natural, it can be returned to nature in its entirety or also
recycled as often as desired.
We do not know exactly when glass was first made. The earliest finds date back to 7000 BC.
We only know that the oldest production of glass was closely connected with pottery. A chance
product created due to the too intense heat in the kilns causing the limey sand and soda to
combine as a coloured glaze on the ceramics. It was only possible to produce glass without its
ceramic base in 1500 BC.
The hardness, durability and colour of glass have inspired the creative spirit of man like no other
material. And there is no other material which has been so closely linked to our culture for so
long like glass. Pure and timeless, durable and beautiful, glass has accompanied man through
the ages since time immemorial, and has decisively enriched life.
We have mastered the art of melting high-quality glass from sand and various additives. Our
melting furnaces have a temperature of more than 1500 °C. Due to the aggressiveness of the
glass, our melting tanks last some 3 to 5 years, and are then renewed.
6