SPME WILL FADE BUT FADE RESITANT INKS ARE AVAILABLE
Yes they do, In direct sun
The sun in the pen - 2010 is rated/received certificates of: Italy:T
On the Sun: No. They are magnetic storms.On you body: No. they fade if you stay out of the Sun.
If you leave it in the sun, or wash it with harsh detergent, yes, it will fade.
Sun treated shades won't fade from constant sunshine.
They normally fade if you avoid being in the sun.
because of photodegration
lighter
Take them down in the daytime.
Ink fades in the sun because the sun breaks it down. The heat from the sun breaks down the molecules in the ink making it less vibrant.
After awile, the Sun in will fade, or it will just grow out of your hair.