Why are the dates on the front and rear car windows different?

1 Answers
VanRiley
07/30/25 4:00am
It is normal for the dates on the front and rear car windows to be different. Different parts of the car are manufactured separately by the suppliers and then assembled by the manufacturer into a new car. The production of car glass involves heating the glass to a temperature close to its softening point in a heating furnace, then quickly transferring it to cooling grids with varying intensities to create uneven cooling. This process generates different stresses in the main viewing area and the peripheral areas of the glass. There are three main types of car glass: laminated glass, tempered glass, and zone-tempered glass. Laminated glass is a glass product made by bonding two or more layers of glass with one or more layers of transparent adhesive material.
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