Due to the fact that tempered glass breaks into uniform small particles without the sharp corners of typical glass knives, it causes minimal damage to the human body and is widely used in cars, interior decoration, and kitchenware.

In homes, it is common for sharp knife shaped corners on broken glass to easily cut children or those who collide, posing a threat to human health. The most important difference between tempered glass and ordinary glass is whether the glass breaks into small particles or a blade shape. However, in practical testing, it is undoubtedly unrealistic to constantly adopt such destructive testing.

So how can we determine if what we are buying is ultimately tempered glass?

This still needs to be analyzed from the manufacturing principle of tempered glass. Tempered glass is obtained by cutting ordinary annealed glass into standardized sizes, heating it to the nearby melting point, and then rapidly and uniformly cooling it. After tempering, uniform compressive stress is formed on the surface of the glass, while tensile stress is formed inside, 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 the main symbol for distinguishing between genuine and fake tempered glass. That is, tempered glass can see color stripes at the edges of the glass through polarizing film, and black and white spots can be observed on the surface layer of the glass. Polarized light plates can be found in camera lenses or glasses. When observing, pay attention to the cleaning of the light source, which makes it easier to observe.

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