You will find your answer in The Film Developing Cookbook. After reading it 20 times I decided to use two developers for the general purpose photography I do. To reduce experimentation, I picked a developer in the solvent and non-solvent class. XTOL is a flexible, environmentally safe, solvent developer. Rodinal is a traditional non-solvent developer.(posted 8813 days ago)I have been romanced by Rodinal, but don't reach for it much. Rodinal is ideal for high resolution, thin-emulsion 120 films where the problem is to maintain, not to reduce the extremely fine grain. In highly diluted form, Rodinal has compensation action. For general purpose photography with medium to high speed films, D/76/ID-11 or XTOL is the place to start.