Speaking of solution volume per roll, especially in the Jobo, I've found that 50ml D-76H stock per roll gives results indistinguishable from more stock, as does 2ml Rodinal stock and 18ml Ilfosol-S stock per roll. I usually use more solution than the minimum required to cover the film so I know I don't need to worry about running close to the edge of developer exhaustion, but all indications so far are that it isn't necessary.(posted 8367 days ago)