Highly Resistant glass is made using a chemical reinforcement process. Glass is immersed in a high temperature bath to replace sodium ions (Na) with potassium ions(K) putting the glass surface in compression, making the glass substantially more resistant to mechanical shocks and thermal stresses.
Highly Resistant glass keeps its initial flatness and optical quality with no strain pattern, as if it was annealed glass (unlike thermally tempered glass).
Highly Resistant glass maintains residual visibility after breakage unlike thermally tempered glass which brakes in very small pieces which prevents acceptable visibility. Therefore, Very High Resistant glass is laminated to consider it as a safety glass.
At equivalent performances, Highly Resistant glass allowing the use of thinner glass giving the benefits of reductions in both weight and thickness.
Typically used for windshields, lightweight side windows or interior glass