I just removed the poster on the left from my salon storefront window. The poster on the right is the original copy of the poster on the left.
Black and Blue inks remained true in color, but all the other colors faded/bleached to white.
UV Protection for the hair, eyes, and skin should be a forethought versus an afterthought.
Sun Block, Sunglasses, and Hats are friends of the "fountain of youth."
From a business standpoint, be careful of products receiving direct sunlight. It will spoil the product.