Heat-strengthened glass is a type of safety glass that is partially tempered through controlled thermal processing. It is heated to a high temperature and then cooled more slowly than fully tempered glass, giving it improved strength. This process makes the glass about twice as strong as regular annealed glass, yet not as strong as fully toughened glass. Heat-strengthened glass does not shatter into tiny cubes; instead, it breaks into larger pieces, reducing the risk of injury. It is commonly used in applications where moderate strength and thermal resistance are required. Because of its stability, it performs well under wind load, temperature variations, and structural movement. The glass maintains better flatness and optical clarity compared to fully tempered glass. It is often selected for laminated units, curtain walls, facades, and skylights. Heat-strengthened glass is ideal when safety is needed without the high stresses found in tempered glass. Overall, it provides a balanced combination of strength, durability, and visual quality for architectural use.

Best Quality toughened glass is made by using latest technique of forced convection type furnace.

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