Hidden protectors: Why black dots on windshields matter
Almost every car windshield has distinctive black dots of varying sizes along its edges. These dots can be found in vehicles regardless of class, manufacturer, or purpose. Why are they there?
The role of these small dots is quite important. To understand it, one needs to know how windshields are mounted in cars. Ceramic paint is applied to the edges of the glass, which is then heated. This process makes the adhesive stick more firmly to the rough surface.
During heating, the paint reaches a much higher temperature than the glass. The dots are crucial because they help prevent large temperature differences across a small glass area, which could lead to damage. That's why their size changes gradually.
Furthermore, the black border on the windshields, known as a frit, conceals the glass's connection to the body and protects the adhesive from the harmful effects of UV rays, extending its durability.
