The inspection of the glass sheet, the quality of the appearance is mainly to check the flatness, to 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 glass. Transparency, mechanical strength and thermal stability of the glass are not suitable for engineering use. Since the glass is a transparent object, the quality can be basically identified by visual inspection at the time of selection. The inspection of 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 meet the requirements, and the side is not allowed to be defective.
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