Heat strengthened glass is made on state of the art electrically heated horizontal furnace, which heats the glass to an uniform temperature of approximately 660ºC. Ceramic rolls convey the glass through these furnaces at speeds regulated to ensure temperature uniformity and minimal optical distortions. The heat strengthened process parallels the traditional process of glass tempering, except that the heating temperatures are lower and the cooling cycle is less rapid. During production, non-destructive verification of the range of stresses is done by using grazing angle surface polar meter to ensure the right surface compression.

Heat strengthened glass is made on state of the art electrically heated horizontal furnace, which heats the glass to an uniform temperature of approximately 660ºC. Ceramic rolls convey the glass through these furnaces at speeds regulated to ensure temperature uniformity and minimal optical distortions. The heat strengthened process parallels the traditional process of glass tempering, except that the heating temperatures are lower and the cooling cycle is less rapid. During production, non-destructive verification of the range of stresses is done by using grazing angle surface polar meter to ensure the right surface compression.