Laminated glass is a kind of safety glass and is hard to break. The glass may be retained in its frame even if being broken. Laminated glass is made of two or more layers of glass with one or more “interlayers” of polymeric material bonded between the glass layers. Poly Vinyl Butyral (PVB) and SentryGlas Plus (SGP) laminated glass is produced using heat and pressure to sandwich a thin layer of PVB or SGP between layers of glass. On occasion, other polymers such as Ethyl Vinyl Acetate (EVA) or Polyurethane (PU) is used. Laminated glass offers many advantages. Safety and security is the best-known of these — rather than shattering on impact, laminated glass is held together by the interlayer, reducing the safety hazard associated with shattered glass fragments, as well as, to some degree, the security risks associated with easy penetration. But the interlayer also provides a way to apply several other technologies and benefits, such as coloring, sound dampening, resistance to fire, ultraviolet filtering, and other technologies that can be embedded in or with the interlayer.