What are the two types of automotive glass commonly identified?

The two types of automotive glass commonly identified are laminated and tempered glass. Laminated glass consists of two or more layers of glass with an interlayer, usually made of polyvinyl butyral (PVB), sandwiched between them. This construction enhances safety by preventing the glass from shattering upon impact; instead, it tends to crack but remain intact, minimizing the risk of injury from sharp glass shards.

Tempered glass, on the other hand, is manufactured through a process of extreme heating and rapid cooling, which increases its strength and thermal resistance. When broken, tempered glass shatters into small, blunt pieces, reducing the risk of severe cuts in the event of an accident.

The other options present terms that are not standard classifications of automotive glass. Shatterproof and safety are more descriptive of glass characteristics but do not denote specific types of glass. Opaque and tinted refer to the visibility characteristics of glass rather than its structural properties. Single layer and double layer refer to the thickness of the glass rather than its construction or integrity types which are defined specifically as laminated or tempered.