How to identify the quality of tempered glass? This has to be analyzed from the principle of tempered glass. The tempered glass is obtained by first cutting the ordinary annealed glass into the required size, then heating it to a near softening point, and then performing rapid and uniform cooling. After tempering, the surface of the glass forms a uniform compressive stress, while the inside forms a tensile stress, which greatly improves the performance of the glass. The tensile strength is more than three times that of the latter, and the impact resistance is more than five times that of the latter. It is also this feature that the stress characteristic is an important sign to identify true and false tempered glass, that is, tempered glass can see colored stripes on the edge of the glass through the polarizing plate, while black and white can be seen in the surface layer of the glass. Interphase spots. Polarizers can be found in camera lenses or glasses. Pay attention to the adjustment of the light source when viewing. It is easier to observe that some semi-tempered glass or hot-bending glass is used as bathroom glass in the market, hot water in winter or cold water in summer. Under the glass, the glass may crack, and the broken glass crucible will have sharp edges and corners, which is easy to hurt. In contrast, all-tempered glass has a tensile strength and impact resistance that is three to five times higher than that of ordinary glass. Even if the breakage breaks, the fragments will not become small fragments with sharp corners, greatly reducing the damage to the human body. Safety glass (fully tempered glass) must be used for partitions, bathroom enclosures and screens. Identifying the authenticity of tempered glass to see the 3C mark, consumers to distinguish tempered glass mainly depends on two points, one is to see if there is a national mandatory security anti-counterfeiting 3C certification mark, followed by carefully review the product warranty period and quality certificate. “As long as you know the exact name of the tempered glass manufacturer or manufacturer, you can directly check the authenticity of the 3C certificate from the official website of the National Certification and Administration Commission.†Xiong said. In addition, it is also possible to identify by hand tapping the glass. The tempered glass gives a crisp sound when struck, and the ordinary glass sound is rather dull. Generally, the bathroom is made of frosted or frosted tempered glass with a thickness of 6~8 mm.
Glass inspection, the appearance quality is mainly to check the flatness, observe the presence or absence of quality defects such as bubbles, inclusions, scratches, lines and fog spots. The glass with such defects will be deformed during use, reducing the transparency of the glass. , mechanical strength and thermal stability of glass, engineering should not be used. Since the glass is a transparent object, the quality can be basically identified by visual inspection at the time of selection.
Inspecting glass processed products, in addition to the requirements of flat glass, should also check the processing quality, whether the standard size, processing accuracy and pattern definition are consistent.
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