Out with my Pinhole camera today in the slate mining areas of North Wales. It was a bright day so I decided to load the camera with Ilford Pan F 120.

On my return home I thought I would process the images in Rodinal 1:50. It has been a couple of years since I had used Rodinal, and in the past I have always used stand development.

Shock horror when I saw the results:

Air bubbles along the top of the negatives! It’s been a long time since I had those. I assume that air bubbles had been trapped between the film edge and the edge of the reel. I had used my normal agitation method: slow continuous for first minute, then four inversions every minute thereafter, each agitation followed by a vigorous rap of the tank.

So perhaps I was agitating too vigorously, having just come from using PMK-Pyro for 6 months? (PMK requires vigorous agitation). Perhaps Rodinal is quite frothy compared to other developers? I don’t know. I will need to put a test film though Rodinal with more gentle inversions before risking any important film. What a pain!


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