In the technology of the 50s and 60s, it is often used to frame the windshield. metal was used. As technology evolves, glue started using.

Really revolutionary It is a change that is taking place, nowadays it is possible to encounter these points in a modest car or a luxury car.

This black dot matrix strip is called a frit.

Frit, high heat applied It is a kind of ceramic paint. It is baked on the edges of the glass during production. It is not possible to scrape glass.

It strengthens the contact between the glass and the car frame.

of the glue better grip on glass It makes this possible by creating “engravings” on the surface, which makes them rougher. Because the glue is not visible, the unsightly appearance is also prevented.

The urethane sealant that bonds the glass to the frame is protected from ultraviolet rays radiated by the sun because it stays under this black band. In this way the glue is prevented from melting and a hazard that prevents the windows from being firmly fixed is prevented. In addition, the strong adhesion of the glass prevents rainwater from penetrating.

So why is the transition between glass and frit in the form of shrinking dots?

Because the dots are black, they heat up more than other parts of the glass. This design by distributing the heat evenly over the glass reduces optical distortion or lensing that will occur in the glass. The reason to have more on the windshield is to minimize distortion.

Even if this smooth transition was not there, the sharp color difference would occur. aesthetics were invisible And that was noticeable even from afar. In this way, because the transition is thinner, an aesthetic appearance is also ensured.

Sources: Science ABC, techWORM, Bright Side