Shoot it, look at the effects to the glass.
The invention of plastic, enabled the production of both bullet-proof, and toughened safety glass. Since both these products have a plastic sheet sandwiched between them.
K glass is a glass with a coating on for energy efficient glazing in double glazed units and is manufactured by pilkington glass this can be sold by any glass outlet and can be in standard form or toughend if required,Darby tuf is owned by Darby glass now out of business and is their stamp to show they made the glass into toughened
Tempering is the process to add properties to the raw glass and to make it Standard or Toughened. If tempered (Heated) and cooled slowly, it becomes standard glass on the other hand if tempered and cooled rapidly, it gains different properties and becomes tough or is called toughened glass. Check the link below.
normal float glass screen is made of a number of glass sheets which can be standard.
Identify the common properties in glass Cup bucket mug and jug
Normal float glass is toughened and the two pieces of toughened glasses stuck together with a multilayer PVB in between (lamination), to make bullet proof glass. Refer: http://theglassblog.wordpress.com/tag/glass-tempering/ https://theglassblog.wordpress.com/tag/laminated-glass/
The material for most bus windows is toughened glassThe material for most bus windows is toughened glass
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Any attempt to cut toughened glass will result in the glass shattering into thousands of pieces. The glass needs to be cut before the glass goes through the toughening process.
Standard toughened glass is class 0
Toughened glass is transparent. It is translucent if frosted. To be opaque, it would need to be covered with something that won't let light through.