The secret role of black dots on your car windscreen revealed
Almost every car windscreen features distinctive black dots of varying sizes around its edges. You will notice them on vehicles regardless of class, manufacturer, or purpose. But why are they present?
The role of these small dots is highly important. To understand it, one must know how windscreens are installed in cars. Ceramic paint is applied to the edges of the glass, which is then heated to secure the adhesive bond to the rough surface.
During heating, the paint achieves a much higher temperature than the glass. The dots are vital because they help to prevent significant temperature differences in a small area of the glass, which could cause damage. This is why their size changes gradually.
Additionally, the black border on the windscreens, known as a frit, conceals the glass's connection to the car body and protects the adhesive from the damaging effects of UV rays, enhancing its durability.
