Both images were printed at the same time, on the same piece of Epson Photo Paper.
The left print was stored in a ziplock bag, in a dark closet. The right one was exposed in the
ozone test. If you look closely at grayscale steps 3 and 4 you can see a slightly warmer tone in the
ozone exposed sample.
The images were scanned in one pass. The scanner is a Microtek E6. All automatic adjustment settings
were disabled.