I've been doing more fiber-based printing over the past couple years, now that I have my own darkroom but I don't know much about toning. Can anyone suggest a good book for basic information on toning processes and products to use? I'm interested mainly in lengthening the life of my prints. The paper I use, for the most part, is Ilford warmtone multigrade glossy so if anyone has suggestions on specific toning processes or products to use with this paper I would appreciate any advice. Thank you!! -- Kim