How to Check the Date on Car Glass?

[SanKarter]

The method to check the date on car glass is as follows: There will be a trademark in the corner of the car glass, consisting of several dots and a number. The number represents the production year of the car glass. If the dots are on the left, it indicates the first half of the year, while dots on the right represent the second half of the year. Car glass is manufactured by heating the glass in a furnace to a temperature close to its softening point, then quickly transferring it to air grids with varying cooling intensities for uneven cooling. This process creates different stress levels between the main viewing area and the peripheral areas of the glass. Generally, glass produced using this technology is zone-tempered glass.