Glass / Crystal
Sculptures have been produced from glass for thousands of years. Artefacts found in Egypt prove that people in ancient times were already making jewellery and art out of glass. Since then, glass processing has been continuously developed in all artistic epochs and had established itself at the latest with Art Nouveau and the success of Louis C. Tiffany. Even today, glass sculptures have a modern and decorative effect. It is, above all, the partial or complete transparency that gives a glass sculpture its extraordinary character. Thus, their appearance can change fundamentally due to the incidence of light. For example, its hue can become lighter, or darker, or it can begin to sparkle in the sunlight. Furthermore, the colours, the cut or even the engravings have a special effect on the glass like on no other material.
A great deal of artisanship is required to process glass for a sculpture. The best-known technique is glassblowing, in which the glass is shaped under heat and air. However, a glass sculpture can also be cast. For this, the artist makes a mould out of refractory material, which is filled with molten glass. Afterwards, the glass sculptures can be engraved, painted, or cut.
Crystal sculpture is closely related to glass sculpture. Their production methods are very similar, but they differ in the mixture of raw materials. The German conditions that must be met for crystal glass are defined in a separate "Crystal Glass Labelling Act". The crystal is usually more transparent, and it has special colour effects due to the refraction of light. This makes a crystal sculpture look particularly elegant and exclusive.