Quote Originally Posted by Pandora
Does anyone know of any good labs that can do negative reduction for me? I'd rather someone with some experience do this as I'm afraid I'm going to ruin the negs...Sanking, can you give me more info about the formulas for the three types if I have to do this myself? Are they in the Cookbook?

Yes, there are formula for all three kinds of reducers in The Darkroom Cookbook.