Laminated Glass is the construction of two lites of glass bonded together by an adhesive material--typically Polyvinyl Butyrol (PVB). This invisible PVB layer is designed to keep the glass integral to the structure upon breakage, rather than allowing the glass to shatter into otherwise large, sharp, and dangerous pieces. PVB also dulls the edges of broken shards of glass, significantly lowering the risk of injury. After undergoing a series of heating and pressing, the two lites of glass and PVB interlayer become one solid, durable glass construction.