Arnie,(posted 8813 days ago)I'm not sure I can be a total help here. I use Delta 100 for studio portraits and develop in Ifosol S 1:8 @ 68F for 8 minutes. I use nikkor tanks and a one time inversion every 30 seconds. I enlarge from 6X4.5 negs to 8x10 prints and everything is clear and smooth. Skin tone is excellent and contrast is good enough for the commercial head shots.
good luck.
chuck k