I've been using Ilford FP4 for a while now: exposure at 64 ISO,\ndevelopment in ID11, 1+1, 20 degrees, 10 minutes (as the suggested 8 min\nalways led to too low contrast). Even with this longer development time\nI find that I have to use filter 3.5 or higher exept in really high\ncontrast conditions. I plan to develop even longer for normal and low\ncontrast conditions (while increasing the film speed to 125 ISO). Say 12\nresp.14 minutes.\nI find this a very strong discrepancy with manufacturer data. Can anyone\ncomment on this. Am I doing something terribly wrong or what?\n\nThanks,\nDick van Nierop.