I'm thinking I might want to try Ilford Multigrade fiber paper. From what I read, Multigrade shows little effect from selenium toning. My question is: How do you know when your print is fully toned? How do you know when your toner is exhausted? With Forte, you pulled the paper when you saw the change. At the beginning of a session, this would happen quickly. As the session progressed, I'd have to leave the paper in longer and longer. Without visible clues, how do you know that your Multigrade paper is adequately toned?