What?! If the most expensive photo ever sold (Andreas Gursky's '99 Cent II Diptychon') will soon fade into oblivion, only to be replaced by a newly printed one several years later, the piece is really only worth the price of the paper it was printed on, not the reported $3.34 million it sold for at Sotheby's February 7, 2007 auction. As far as the headache of conservation is concerned, the silicone gel used to face-mount these c-prints to acrylic glass, while stable and highly protective, is irreversible! (Huge no-no!) Under these conditions a print will last longer, but once fading starts there's no stopping it. Only if the artist is still alive or the negatives/digital images are available and can be re-printed can a collector recoup the loss. Quel nightmare!
Pigments fade and change. It's what they do. Oil paints are not immune to the aging process, however they have the decency to age gracefully. I'm glad somebody's dealing with c-prints and it's not me.