Dave Weller said:
Take your picture and put it in direct sunlight and You will see them
turning yellow (many others experienced this btw).
You should read the manual first (is shipped with the paper).
Canon photo paper pro is only good for albums or dark rooms
I have a picture on the wall for 2 years now (under glass) in a rather
sunny room and it hasn't faded even a bit. If you expose it to DIRECT
sunlight (or air), it's normal that it will fade.
So the pr-101 is not only good for "for albums or dark rooms". Keep it
in right conditions and you will see that other papers will fade after
some time and pr-101 will not.
Wayne