asked
How is bullet-proof glass made?
It might be better to call it ‘bullet-resistant’ glass, because it resists penetration, although a series of bullets fired at the same place will eventually break through. It is usually made by sandwiching a layer of deformable polycarbonate plastic between glass layers. The bullet’s impact shatters the outer layer of glass, spreading the energy over a wide area so the plastic layer ‘gives’, but does not rupture.
