Here is a trick to avoid loading problems. When you rewind the film, leave the leader out, or retrieve it from the canister before you start. With the lights on, cut the leader straight across, clip the corners, and start the loading of the reel in the light. This way you can assure that the film is started correctly on the reel. Turn off the lights and feed the film directly from the canister onto the reel by pulling the film out of the canister with the reel. This eliminates most problems from finger prints and buckling.(posted 8201 days ago)After you dry your negatives, place in plastic sleeves and place under a weight for a day or so. Also leave the film in the sleeves to make contact prints, by placing under a piece of glass with the paper. Other tips include a final rinse in distilled water and a 1/2 drop of photoflo to eliminate spotting and streaking on the dried negatives.
All of my 35mm B&W was shoot in an FE, FM and F-3 and I never had this problem. The only film I currently use that tends to curl is 120 MACO 820 Infared film. A day under a weigh seems to take care of it nicely.