For example if you buy a bright red car, in 5 years it is gonna be less bright red because it has been in the sun for a long time. Why is that?
In: Physics
Its mostly just sun rays that wash out colors. Natural things that are more UV resistamt will keep their color, but the sun rays essentially split the chemical bonds that make up the colors in the paint. However, for color to fully wash away takes a lot of time, just for the rays to make it all the way through. Depends on weight and material. Think about laser etching. It literally busts away the chemicals that ARE there, and leaves a byproduct over a good amount of time. Usually in the form of oxides or gases. The sun can drive a lot of weird things.
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