Laminated glass is two or more panes of glass with one or more layers of polyvinyl butyral (PVB) sandwiched between them and treated. The glass panes can be basic float glass or tempered or heat strengthened panel. If the glass is broken, fragments tend to adhere to the PVB inter layer thereby reducing the risk injury from falling glass and helping to resist further impact or weather damage. It is most suitable wherever safety, security, noise control or UV control is a requirement. The single largest use of laminated glass is in automobile windscreens. Glass can also be laminated with special PVB like – Coloured PVB in transparent, translucent and opaque, Acoustic PVB for improved acoustic performance and Sentry Glass for better structural strength.