I'm having a hard time getting a true grasp on the effects of pH in film developers. It seems that with traditional (non-staining) developers, moving, for instance from 8.00 to 8.20 has a rather distinct effect on developer activity. When working with catechol concoctions recently, it seems that one needs to be at 10.5 to 11.0 ranges to achieve reasonable activity. Could someone who is versed in this help put some sense to this for me? I assume it must be related to surface development/staining issues but I'm just guessing at best. Somewhat related: Has anyone done any work on staining monobath concentrates (TEA/PG based) that can create required alkaline levels without relying on a second component for this duty?