And then I'll shut up and go buy the book. I also want to get that other book, something about darkroom cookbook, or something like that. Can someone give me the title? In the meantime, could someone explain why the advantages are seen more in the slower films, and whether it's still worth it to use for HP5+. My thinking at this point is that I would rather have one chemical like PMK and two films like HP5 and FP4. I know I will use the HP5 most of the time, but it will be an easy transition to use the FP4 when desired. Thanks again for the information. It's incredibly helpful. I can't wait to start my darkroom.(posted 8912 days ago)John Kilmer