Because after tempered glass is broken, the fragments will break into uniform small particles without the common sharp corners of glass knives, it is called safety glass and widely used in cars and interior decoration.

In homes, the sharp knife shaped corners of broken glass can easily cut children or those who are hit, causing damage to the body. The main difference between tempered glass and regular glass is whether the glass breaks into small particles or a knife like shape. But in engineering inspections, it is undoubtedly unrealistic to constantly use such destructive inspections.

So how can I know if what I bought is tempered glass?

This still needs to be analyzed from the principle of tempered glass production. Tempered glass is obtained by cutting general annealed glass into the required size, heating it to the nearest softening point, and then rapidly and uniformly cooling it. After tempering treatment, uniform compressive stress is formed on the surface of the glass, while tensile stress is formed inside, greatly improving the performance of the glass. The tensile strength is more than 3 times that of the latter, and the impact resistance is more than 5 times that of the latter.

It is precisely this feature that makes stress characteristics an important indicator for distinguishing between genuine and fake tempered glass. That is, tempered glass can see colored stripes at the edges of the glass through polarizing film, while black and white spots can be observed on the surface layer of the glass. Polarized light can be found in camera lenses or glasses, so pay attention to adjusting the light source when observing, which makes it easier to observe.

Article source: Tempered glass coverwww.yinghuade.com