Which one of the following glasses is used in bullet proof screens?

Bulletproof screens are constructed using reinforced glass, specifically through a process of lamination. This involves bonding multiple layers of glass with flexible interlayers, such as polyvinyl butyral (PVB) or polycarbonate [t2][t7]. The resulting composite material, often referred to as glass-clad polycarbonate or laminated glass, is designed to absorb the kinetic energy of projectiles [t8][t9]. While soda-lime silicate and borosilicate (Pyrex/Jena) glasses are used as the base glass layers in these composites [t3][t4], the defining characteristic of bulletproof glass is its reinforced, multi-layered structure that prevents shattering and penetration [t2][t8]. Soda glass (Option 1) is standard window glass, while Pyrex (Option 2) and Jena (Option 3) are types of borosilicate glass primarily valued for thermal resistance in laboratory and kitchenware [t5][t6]. Therefore, reinforced (laminated) glass is the most accurate description for bullet-resistant screens.

Sources

1. [1] https://en.wikipedia.org/wiki/Bulletproof_glass