A couple of days ago, I made a couple of copies of a print, split toned one of them it in sepia toner, and laid both out to dry on the drying rack. Today, I was back in the darkroom with two goals: (1) to finish the prints by toning them in selenium, and (b) make a couple more copies of the toned print since I liked it so much. Same variables, but today the prints came out 1/3 stop lighter than a couple of days ago! This always seems to be the case. When will I learn!