Black dots on car windows: More than meets the eye in vehicle safety and longevity

To comprehend their function, we must investigate how car windows are installed. Glass panes, when mounted on a car, have their edges coated with ceramic paint and are subsequently heated. This process aims to create a roughened surface for the adhesive to grip effectively and ensure installment.

In the heating phase, the ceramic paint attains a significantly higher final temperature than the glass. The purpose of the black dots on the window edges is to thwart a substantial temperature difference in a tiny window segment, which could potentially damage it. Hence, the variation in dot sizes facilitates a gradual temperature transition.

However, there's more to these miniscule black dots. They are integral to the 'frit,' or the black border of the window. The function of the frit is to camouflage the adhesive used for window fixation. Moreover, it shields the adhesive from the detrimental effects of ultraviolet rays, thus aiding its longevity. Consequently, this makes the car window more durable and safe.