http://unblinkingeye.com/Articles/Mortensen/mortensen.html If lighting is flat, portraits (of light-haired people?) can be underexposed and push processed to give greater contrast between different parts of the skin. I tried it with a modern film, the flat curve Fuji Acros, developed in Fomadon Excel (similar to Xtol, just happened to have this). 2 studio lights close to the photographer were used. Exposure was incident light on the model via a reliable flash meter. (1) Normally exposed and developed. (2) Underexposed 1 stop, developed 40% longer. (3) Underexposed 1 stop, developed 40 minutes, agitated every 10 min -this is complete development, called gamma infinity. Attachments are inverted negative scans, black/white points set, sharpened equally, resized, no other changes. I wonder if there are any comments on underexposing and overdeveloping portraits, thanks.