I toned some prints tonight...Polymax FB and Bergger VCNB...and thought I had them just right when I took them out of the selenium. I put them in water and then the wash, and by the time they were in the wash they were lavender.
I have such a hard time seeing the difference in color until it's too late. And it's even harder with Polymax, which is neutral to cold to begin with.
I use selenium 1:9 by the way. When I have used it more dilute and it takes longer and is slower I have an even HARDER time.