Please have a look at the attached image. You'll immediately see the dark streaked edges and sprocket holes.
This is Adox CHS 25, exposed at box speed, and developed in Adox APH09, 1+50 (6ml+300ml), 8 min @ 20C; Paterson single reel tank, 30 seconds initial - gentle - inversions then one gentle inversion every 30 seconds. Water stop, Ilford Rapid Fix 4 minutes, then Ilford wash regime.
Only the first 9 frames or so show these markings, the rest of the reel looks fine.
I will add that this roll was "sticky" going on to the developing spiral - I had to "inch" the last part of the roll on in small increments lest it jam. The image show the beginning of the reel, thus is deepest into the spiral
I am presuming that this is a problem of insufficient developer reaching these parts of the emulsion, but I am unclear how this might have come about. Is it because the film has buckled against the spiral grooves as it has jammed slightly (the marking is quite regular as you can see) - forcing it to "bunch up" ?
Could those with greater knowledge and experience comment please?