My company is Produce Automobile glass And PVB Film ,windshield,
windscreen, safety glass, laminated glass, tempered glass, auto
glass. Bullet-Resistant.manufacturer.
Tempered glass ("heat-strengthened", "toughened glass") is plate
glass that has been heat tempered to increase its strength. Glass
heated to its softening point floats on a bed of tin (which is why
it is sometimes referred to as "float" glass or "safety float"
glass), and air jets blast the surface of the glass with cold air.
This causes the glass to harden quickly on the outside, while the
inside continues to cool slowly and to contract. This contraction
puts the outer layers in compression while the inside of the glass
is in tension. Because of this process, tempered glass is five to
eight times stronger than ordinary glass. Even it break, it
shatters, the fracture edge is round not sharp which is also
relatively safe for the peopl