Safety glass formed by two monolithic glass sheets of 12 mm each, joined by an intermediate film of PVB. The butyral sheet can be colored, giving a touch of color without sacrificing transparency, or the brightness of glass.
Laminated glass consists of two or more sheets of float glass monolithic intimately connected to interposing sheets of plastic material (polyvinyl butyral PVB or EVA ethyl vinyl acetate).
If you break the glass pieces are attached to giving security butyral people and avoiding the passage through it. This way you can get very high glass thickness (from several centimeters) with a high mechanical strength and impact (bulletproof glass).