Thermally toughened glass without anisotropies

Tempered glass is an integral part of architecture. Thermal toughening transforms glass from a brittle and fragile material into a strong and resilient one. With one disadvantage: anisotropies. They are a so-called double refraction phenomenon due to the induced thermal stress. The eye recognises this effect as a shimmering effect in the glass (interference colour). 

The elimination of anisotropies

sedak’s advanced tempering process sets new standards in glass. Thanks to cutting-edge manufacturing technology, sedak tempered+ achieves a homogenous structure, rendering it not only highly resistant to impact and extreme temperatures, but also providing remarkable clarity and vision. Like conventionally tempered glass, sedak tempered+ is produced by heating the glass to a high temperature, usually around 620°C (1,184°F), and then rapidly cooling it using air jets. By balancing heating and cooling, sedak’s patented tempering technology reduces the stress differences in the glass. It does not create any anisotropies. A polarising filter reveals the difference between sedak tempered+ and conventionally tempered glass.