Tempered Glasses

When it is desired to become heat and impact resistant, the glass is subjected to a process called tempering. The tempering process is based on the principle of rapid cooling of glass panels after heating them in special furnaces to temperatures close to their melting point. The glass is heated to 700°C and cooled by blowing air. As the temperature decreases, the surface shrinks and hardens. However, internal The part remains hot and adapts to the shrinkage on the surface. Interior As the part cools down, the pressure on both sides of the glass increases and the internal pressure increases. In this part, tensile stresses occur. While glass that has been tempered by sudden cooling becomes resistant to a thermal shock of 300°C, a thermal shock of 30-50°C in non-tempered glass causes the glass to break.