Omar, I couldn't agree more with Alan. the "correct time" is the time that allows you to achieve desired results. If you are not happy with the way your FP4 looks, try rodinol @ 1:50. for years i processed my FP4 (rateed at 80) in ID-11 1:1 for 9 1/2 min. @ 68f. about a year ago i started processing it in rodinol 1:50 for 17min. @ 68f and rating it at 100. Sean(posted 9209 days ago)