Why is there a pattern of black dots on my car's windows?

What is that pattern on my car windows for? Is it just for looks?

Have you ever wondered why the windows in vehicles have a half-tone pattern of black dots on them? If so, you're not alone. Turns out these dots serve a very useful purpose.

When cars were first beginning to be mass produced, manufacturers used metal trim to hold the glass in place. As car makers learned this wasn't an efficient way to hold glass in place, they moved to using adhesive for securing windows into vehicles. This began to happen in the mid-1950's. 

Truth be told, the black adhesive was effective, but ugly. It was then decided to paint clean black trim around the edges of windows to hide the ugly adhesive. These trim areas are called frits and they're made of ceramic paint. The ceramic paint is baked into the glass, ensuring it's extremely durable. The frits help hold the glue in place, which of course holds the glass in place.

But what's up with the half-tone pattern dots? They serve a purpose, too. The black dots allow the heat that  builds up in glass to be distributed more evenly across the glass so that the window won't warp.

Categories: New Inventory