Laminated Resistant Glass.
We installed some of the heavy glass in a steel wall in the reception area at the foot of the stairs -where we could check visitors before releasing the steel entrance door - and we and the range guns were protected internally by a wire-mesh and sheet steel cage.
Bullet Resistant Stainless Steel Mesh.
Bullet-Resistant Glass is made from laminations of tempered glass and clear thermoplastic resins such as polycarbonate. - Generally speaking the outer layers of glass flatten the bullet and the plastic layer then absorbs its energy and stops it. The ability of polycarbonate to slow and stop a projectile is directly dependent on thickness of the laminations - sometimes as much as three and a half inches.
I'm pleased to report that our Bullet-Proof glass was never tested other than by being punched a couple of times (Just checking perhaps?).
Polycarbonate is one of the toughest plastics made - but it is affected by exposure to sun light. -Its performance when used in armoured vehicles deteriorates with time and needs to be replaced at intervals.
More recently - clear ceramics are being used to protect military vehicles. Transparent Armour Gun Shields (TAGS) are used to protect machine-guns mounted on armoured fighting vehicles.
M240 Machine gun Mounted on M1A2 Abrams Tank - Iraq 2005.
Ceramic Plates for body armour - also known as 'trauma plates' are subject to much ongoing development. - One area of active development is the use of small (overlapping?) component plates as the large monolithic torso plates are subject to cracking.
Ceramic Ballistic Plates.
That stuff works eh!
Marty K
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