Classification of Safety Glass and How to Measure the Thickness?

Safety glass is glass with additional safety features that make it less likely to break, or less likely to pose a threat when broken. How to classify safety glass? How to test safety glass thickness with glass thickness gage?
    Safety glass includes tempered glass (also known as toughened glass), wire mesh glass (also known as wired glass), laminated glass, and engraved glass. Safety glass can be used in jewelry stores, libraries, commercial buildings, hospitals, airports, etc. Next we will introduce four safety glasses.
    1.Toughened glass is processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. Tempering, by design, creates balanced internal stresses which causes the glass sheet, when broken, to crumble into small granular chunks of similar size and shape instead of splintering into random, jagged shards. 
    2.Laminated glass is composed layers of glass and plastic held together by an interlayer. When laminated glass is broken, it is held in place by an interlayer, typically of polyvinyl butyral (PVB), between its two or more layers of glass, which crumble into small pieces. The interlayer keeps the layers of glass bonded even when broken, and its toughening prevents the glass from breaking up into large sharp pieces. This produces a characteristic "spider web" cracking pattern (radial and concentric cracks) when the impact is not enough to completely pierce the glass.
    3.Wire mesh glass has a grid or mesh of thin metal wire embedded within the glass. 
    4.In 2014, researchers used lasers to create an analogue of nacre by engraving networks of wavy 3D "micro-cracks" in glass microscope slides. When the slides were subjected to an impact, the micro-cracks absorbed and dispersed the energy, keeping the glass from shattering.
    According to different standards, the thickness of the glass is also different. How do we test the thickness of the glass? Yes, digital glass thickness gage will be very convenient.
    As shown below, we are testing the thickness of a toughened glass and a laminated glass with a glass thickness gage. We can not only read the thickness of the glass, but also test the thickness of the air layer.

More information about glass thickness gage, please refer to “LS201 digital glass thickness gage”