12 minutes, 30 seconds at 20°C/68.0°F
Dev dilution and time are Ilford's recommendation for Perceptol and Acros 100.
5 inversions in 10 seconds for every minute.
Vinegar stop, TF-5 fixer (abt 4-5 minutes) and about 10 invert-and-dump rinses.
By rcky on 09 August 2013