Maybe is not a secret but I learned for a friend how to have perfect flat film after developing and I want to share that for the forum colleagues who don’t know about it.
After you take of the film from the tank spiral, just let it for some 5-10 minutes to dry in the room and after that when is still wet, put it back upside down on the tank spiral, with the emulsion to exterior. Take a hair dryer and dry it while is in the spiral by giving hot air from sides.
When dry take it off and cut it in 4-6 frames accordingly to your scanner.
You will have perfect flat negative…. No more scanner issues.
Only ML. PRIME: 15mm-2.8, 24mm-2.8, 28mm2.8, 35mm-2.8, 50mm-1:1.4, 55mm-1:4, 100mm-3.5, 135mm-2.8, 200mm C 2.8, 500mm-8,