Greetings!

I have reasonably good basic darkroom knowledge and equipment, and my black and white work is now exclusively in 4x5 format. I want to take my print-making to the next step in quality. I have a bottle of Kodak selenium toner, but I've never tried to use it. I understand that it will make my prints look much richer. How should it be used, and what precautions do I need to take with it?

Thanks!

RobR