SSG® DuraGlas-T employs the use of a thermal process to enhance the basic strength of annealed glass via a tempering furnace. Annealed glass is heated close to its softening point; it is then rapidly quenched by directing jets of cold air onto its surface. The surfaces are placed in compression during the quenching process, resulting in balanced induced stresses giving SSG® DuraGlas-T its added mechanical, thermal and impact resistance properties.
The tempering process does not alter visible light and solar radiant heat properties of the glass. Coated glass, such as low emissivity glass providing solar control with high visible light transmission can be tempered too. Spontaneous breakages due to nickel sulphide formation can also be reduced via additional heat-soaking as featured in SSG DuraGlas-Q.