Processing fault?

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Dave
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Here's an image from one of the first rolls (lengths) in an Agfa ISO-Rapid C camera. A simple P&S camera of the 60's. The image has a line of darker blobs along the top of the frame.
There's some procedures to carry out to get a length of film off a 35mm cassette and pushed into a Rapid system cartridge, so there may be some scope to flash the film in the changing bag. Loading it into the camera is very easy, but I guess that light ingress is possible. The 24x24 frames have five sprocket holes adjacent to them, but their position changes along the roll. This frame's darker blobs coincide with the holes. Fomapan 100 was used and developed in Bellini Duo step in a single reel 135 Paterson tank. The negative is very dense due to overexposure (the camera is meant for slower film).

This and several other frames from that "roll" show shadowy marks along the top of the frame. Most images that show a plain sky seem to have it to some extent. Later rolls from the same camera don't have this. I don't know which way was up in the dev tank, but could this be a processing fault/error?

SAM_3949m.jpg

Usual dev process: Soak film in water four/five mins, then 4 mins in Part A then 4 mins part B, agitation for first 15 secs then one inversion and shimmy each minute. Fix 2 mins, frequent inversions. As Bellini duo Step is reusable, I usually put in more than the minimum amount (I could have screwed this up).
 
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..so... if the blobs are darker, the neg is lighter here, and does that equate to less development? Oh hang on... could be more development between the holes.? .....

Is this a possible agitation thing?
 
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Bromide drag would more usually be lines, but can form from sprocket holes. Bromide is a restrainer- meaning holds back development.

I'm not venturing an opinion because on my screen I can't even see the problem.
 
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