What type of glass is commonly used for the rear window of vehicles?

The rear window of vehicles is commonly made of tempered glass because it is designed to withstand high levels of stress and impact while providing safety to vehicle occupants. Tempered glass is created through a process of extreme heating and rapid cooling that increases its strength compared to regular glass. When broken, tempered glass shatters into small, blunt pieces that are less likely to cause injury, which is a critical safety feature for passengers in case of an accident.

This choice reflects the necessary balance between safety and durability for rear windows, which need to be sturdy enough to resist breakage from external forces or accidents while ensuring passenger protection. While laminated glass is often used in windshields for its ability to hold together when shattered, it is not typically used in rear windows due to weight and cost considerations. Safety glass is a broad term that encompasses various types, including both tempered and laminated glass, making it less specific. Bulletproof glass, on the other hand, is specialized for high-security applications and is not a standard material used in regular vehicles.