The base product for Kite toughened glass is annealed soda-lime silica glass. The raw material is subjected to a heat treatment process, which induces a compressive stress to the surfaces of the glass panel. This increase in compressive stress increases the resistance to mechanical forces.
Generally, toughened glass is five times stronger than the same thickness of annealed glass. Surface resistance to scratching and abrasion does not change and the edges of a panel of toughened glass have the same vulnerability to those of non-toughened glasses.