What does the sun do to pigment that makes it fade over time?
In: Physics
UV radiation is EMR that has a little more power than the visible light spectrum so we’re talking some photons packing a decent punch of energy, and an aaaaabsolute *shitload* of photons coming here from the Sun to begin with. These photons hit the dyes and pigments and impart some of their energy by being absorbed, over time breaking the molecules down.
The colors fade because of exposure to UV radiation from the sun. UV radiation causes reaction with most things it comes in contact with and degrades them over time. Paint will lose its color, plastic will become brittle. Some materials (and paints) are more resistant than others to UV radiation and some are less resistant and will get effected more/faster.
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