How to distinguish tempered glass and ordinary glass
First, see if there is a 3C certification mark on the glass. Tempered glass factories are all qualified and will print the 3C logo on the processed glass.
According to national regulations, the safety glass must have the 3C mark.
Second, if there is no 3C mark on the glass, compare the appearance of the glass to see the flatness of the glass. Because the tempered glass has been processed at high temperatures, it has a certain degree of unevenness.
Third, the oblique sunlight contrast is also due to the processing of the tempered glass. The tempered glass has local rainbow spots (wind spots).
Fourth, toughened glass breaks into small particles, while ordinary float glass breaks into large pieces of knife shape.
Fifth, the light reflection identification method of using the sky outdoors or using windows indoors: Look at the sky reflected by the glass or the light of the windows, and slowly change the angle of observation. If it is tempered glass, you may see the glass surface
There is a row of regular blue-gray circles, or ellipses, or long strips with dark colors in the middle and light and fuzzy borders.
