bulletproof glass

Bulletproof glass, a type of safety glass, is designed to resist penetration by projectiles. It is typically constructed by laminating multiple layers of glass with plastic interlayers, such as polyvinyl butyral (PVB). This construction absorbs the impact energy, preventing the glass from shattering into dangerous shards.12

Alternatively, safety glass can be strengthened through heat treatment, a process called tempering. This involves heating glass and then rapidly cooling it, increasing its strength significantly. When tempered glass breaks, it shatters into smaller, less harmful fragments. Bulletproof glass often utilizes the lamination method, though in some cases, a single thick sheet of annealed glass may be used.12