I remember when I got into photography my Mom handed me a compact p&s 35mm camera with half a roll of kodak color print film yet to be shot still loaded in it. Half the roll had been exposed easily 10 years before. I shot the remainder of the film and processed it, and what I found was that the frames exposed when the film was still fresh looked great, despite being left in the camera for more than a decade. The more recent frames that I took however were underexposed and had a reddish tint (could have been the tungsten lighting, though it was tungsten film). I remember being surprised that the original frames looked so good, I was expecting the whole roll to look like the more recent ones.