I used the ilfosol s developer for the first time yesterday. The film was an FP-4 shoot at 125 iso. The film was shoot to place shadows at zone III. Most of the highights fell in zone VI, but my previsualization of the scene was highlights at VII so i overdeveloped it a little bit. The instructions read 4 minutes at a 1:9 dilution and I did 5 mins. I haven´t seen the results on a copy but the negs. look good. maybe an extra 15 sec. wouldn´t have done bad(posted 8232 days ago)My advise: Try 4.5 minutes at 20Cº (take a look at the temperature before the last minute of developing). Shake the tank for the first min. and then twice every 30 seconds.