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Tempered or toughened glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. Tempering puts the outer surfaces into compression and the interior into tension .
Common designs include toughened glass (also known as tempered glass), laminated glass, and wire mesh glass (also known as wired glass). Toughened glass was invented in 1874 by Francois Barthelemy Alfred Royer de la Bastie. [1] Wire mesh glass was invented in 1892 by Frank Shuman. [2] [3] Laminated glass was invented in 1903 by the French ...
The Triplex Safety Glass Company Ltd was founded in 1912 by Kent-born Reginald Delpech (30 March 1881 - 29 May 1935). [2] [3] The company was established in 1912 to build laminated windscreens in Britain, under French patents.
Safety and security films are used where there is a potential for injury from broken glass (such as glass doors or overhead glazing). These films can be applied to toughened, annealed, or laminated glass. They are available in various thicknesses, from 100 micrometers (or 4 mils minimum 2 ply) through to 525 micrometers + (21 mils).
In automobiles, the laminated glass panel is around 6.5 mm (0.26 inches) thick, in comparison to airplane glass being three times as thick. [21] In airliners on the front and side cockpit windows, there is often three plies of 4 mm toughened glass with 2.6 mm thick PVB between them.
A typical installation of insulated glass windows with uPVC frames. Possibly the earliest use of double glazing was in Siberia, where it was observed by Henry Seebohm in 1877 as an established necessity in the Yeniseysk area where the bitterly cold winter temperatures regularly fall below -50° C, indicating how the concept may have started: [2]