The two most common types of safety glass are tempered glass and
laminated glass. They are usually used in high traffic areas,
such as door entrances.
Laminated glass is manufactured from two pieces of glass held together
by flexible clear plastic. It can be cut to size just like regular
glass. If the glass is broken, the plastic keeps it together to
prevent sharp edges, which may cause injuries. Laminated glass
prevents objects from passing through it even after it has been
damaged. That is why it is used on car windshields and storefronts
to prevent intruders.
Tempered glass is manufactured by exposing it to high temperatures.
This process makes it up to five times stronger than regular glass and
brings up its heat tolerance. When broken it shatters into many tiny
pieces. That prevents long sharp edges, which may lead to personal
injuries. Its safety features are used in car windows (except
windshields), entrances, tabletops, and others places where safety
is an issue. Tempered glass is also used in fireplaces, ovens, and
other high heat places.
Unlike regular and laminated glass, tempered glass shatters when
cut. That is why all tempered glass is always custom made.
Preparing regular glass to size and then tempering it is the process
to manufacture tempered glass.