Due to the fact that tempered glass breaks down into uniform small particles and does not have sharp edges throughout the glass blade, it is called safety glass and widely used in cars and interior decoration.

In homes, the sharp blade shaped corners of broken glass can easily cut children or impactors, causing harm to the body. The main difference between tempered glass and ordinary glass is whether the glass breaks into small particles or a blade shape. But in engineering inspections, it is undoubtedly unrealistic to always choose such destructive inspections.

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

This still needs to be analyzed from the manufacturing principle of tempered glass. Tempered glass is obtained by cutting general annealed glass into the required size, heating it to a near softening point, and then rapidly and uniformly cooling it. After tempering treatment, the surface of the glass forms uniform compressive stress, while the interior forms tensile stress, which greatly improves 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 characteristic 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, and black and white spots can be seen on the surface layer of the glass. Polarized light plates can be found in camera lenses or glasses. When conducting investigations, pay attention to adjusting the light source, which makes the investigation easier.

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