<p>Thank you very much for all your answers.</p>
<p>To add some more information, the line runs across the whole frame, including the data. It just happens on some of the frames, not all of them. I'm using a Paterson tank and a plastic reel with the steel bearings. Sometimes it can get stuck, bending the film. I'm using 390ml of developer as per the Paterson tank instructions, but I could add more developer to the tank. How much more should I use?<br>
Usually I do 10 seconds of agitation every 30 seconds or 1 minute of development as suggested by the Massive Dev Chart. It amounts to 5 complete inversions.<br>
After that I use a 1 minute of Kodak Indicator Stop Bath shaken all the time and 5 minutes of Kodak Rapid Fixer shaken every minute.<br>
Any other thing I should Improve in my development technique?<br>
Thanks for all your help!</p>