- Tempered glass is less brittle because the tempering process eliminates the imperfections that weaken regular glass.
-
The intense heat (over 750 degrees Celsius) used to harden the glass creates a dense outer envelope as it cools, which creates improved insulating properties.
- Three-quarter-inch thick tempered glass can withstand the impact of a half-pound iron ball dropped from a height of 36 feet, but a comparable piece of plate glass will generally break if the weight is dropped from a height of 3 feet.
-
Tempering makes glass that can withstand thousands more pounds per square inch than plate glass, making it a favorite material for tabletops and other weight-bearing surfaces.
- Because of its density, tempered glass is generally less clear or transparent than comparable plate glass and is often colored or coated with reflective materials, which also protects its surface.
-
Tempered glass crumbles rather than shattering, which is a preferable trait for uses that may be subject to sudden forces, like car windshields.
- Architects choose hardened glass for exterior walls, doors, even buildings in hurricane zones---anywhere an exceptionally strong, flexible, transparent material is needed.
