TechHidden functions of car window dots: Safety and authenticity revealed

Hidden functions of car window dots: Safety and authenticity revealed

Not everyone may have noticed the surprising feature on car windows, which are the black dots. These small, dark markings are not just dirt or decorations. So, what exactly are these black dots on car windows?

What are the black dots on the car window for?
What are the black dots on the car window for?
Images source: © Getty Images | ti_to_tito

You might be curious about this element now, which you'll find on every newer model of a vehicle, whereas older cars don't have them. Black dots on car windows aren't a matter of fashion but something much more functional and worth knowing about.

Black dots on car windows - what are they?

The term "frit" might be new to you, but these small spots are hugely significant for every car. The dots are found not only on windows but also on mirrors. Without them, driving could be more challenging, as their purpose includes reducing glare, which could complicate vehicle operation. On mirrors, they divide visibility into sectors: spherical and aspherical.

The aspherical area expands the field of view, preventing dangerous blind spots. Although not all drivers are aware of its usefulness, it is definitely an effective "sensor" worth utilizing. The spherical area, conversely, operates differently and was predominant in older car models. Moreover, the number of black dots provides information about the window's production date and reveals the year of production through embedded numbers, assisting in verifying the authenticity of the windows.

What function do black dots on windows serve?

Black dots are created during the window manufacturing process through a special screen printing technique. They adhere to the glass, ensuring durability and resistance. This process is crucial as it aids in attaching windows with frit, ensuring the durability of the structure, which protects the car interior from excessive heating due to atmospheric conditions.

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