How to quickly distinguish the difference between ordinary glass and tempered glass?
2024-09-26
Distinguish 1, break
After the tempered glass is broken, the fragments will be broken into uniform small particles and there is no common glass knife-like sharp corners, so it is called safety glass and is widely used in automobiles and interior decoration.
In the home, the sharp knife-like corners of ordinary glass can easily cut children or rammers after breaking, causing personal injury. After the glass is broken into small particles or knife-shaped This is the main difference between tempered glass and ordinary glass. However, in engineering inspection, it is undoubtedly unrealistic to use this destructive inspection at any time.
Resolution 2 Polarizer
This has to be analyzed from the principle of tempered glass manufacturing. Tempered glass is obtained by cutting ordinary annealed glass into required sizes, then heating to close to the softening point, and then performing rapid and uniform cooling. After tempering treatment, the surface of the glass forms uniform compressive stress, while the internal tensile stress is formed, so that the performance of the glass can be greatly improved, the tensile strength is more than 3 times of the latter, and the impact resistance is more than 5 times of the latter.
It is also this feature, the stress characteristics of the identification of true and false tempered glass is an important symbol, that is, tempered glass can be seen through the polarized light plate at the edge of the glass to see the color stripes, and in the glass surface observation, you can see the black and white spots. Polarizers can be found in camera lenses or glasses. Pay attention to the adjustment of the light source when observing, so it is easier to observe.
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