I had some lith prints that I made through a two bath development and the developers weren't very conventional. The blacks weren't quite what I wanted and the just weren't going to develop out. I tried selenium 1:10 but it didn't deepen the blacks. Is it the only toner that starts in blacks and works its way to mids and highlights? Also, if I couldn't get it in development does that mean selenium (or other toner) has nothing to work with? Thanks!