by 
Life is full of small secrets, e.g.
And during an Instagram scroll recently in Instagram scroll, another generally registered dilemma presented me.
“Why does the train have the small points at the window?”
After all, in their caption, they explained “not only for decoration”.
What do the black dots do in Zug windows?
First, they are not exclusive to trains – they can also be found in autorettes, especially on the front and back of some vehicles.
And as the engineering enthusiast emphasized, you are designed to “fight thermal stress so that your window does not fall in a heat wave”.
Technically referred to as “frits”, the small points are a “baked … pattern that is there because the glass and the metal frame around you expand with different rates.”
The dotted pattern “distributes heat a little more evenly, so that the glass does not crack”.
Although the poster describes the points as “ceramics”, it describes it AutoGlaze explained They are actually a black enamel, a ceramic coating.
These “actually help to distribute the temperature evenly in order to reduce the optical distortion or the ‘lenses”, the vehicle glass office continues.
“This happens when the Frit band (the solid black man) heats up much faster than the glass of the windshield, which creates an optical distortion that either curved straight lines or seemed to be adopted in the direction of the middle.”
The stains that fade when they continue from the Glasecand “relieve this phenomenon by derived the heat and spread evenly”.
Are there any other advantages for black dots on windshields and windows?
Yes.
You can help get the sealant with which the glass is attached to its frame by preventing the heat from the sun from melting the glue.
They also offer a rough surface to better glue the adhesive. But yes, the temperature regulation is a large part of its function.
“Finally know that this is very satisfactory for my inner child,” wrote a commentator in the original contribution of the Instagram user.
“I always asked myself!” Another Instagrammer wrote.
Who knew that so much engineering went into these tiny stains …
