I rated it at 100 and developed in PMK for 12.5 minutes at 70 degrees. It is a very old-fashioned emulsion that stains well in PMK. I liked the skin tones I got from it for my fine art nudes.(posted 8276 days ago)Another person tested the sheet film and suggested rating it at 100 and developing in a tray in D-76 (1:1) for 13.5 minutes at 68 degrees. I haven't tried that combination myself.