film with strange traces

[caila77]

I've never had anything like this happen to me. After developing a roll of film at 200 ISO at 320 ISO, I found the lines you see attached on some of the last frames I shot (not all). Since the defect is only present on some frames, I wouldn't blame it on the development (HC-110). Or maybe I could?

 

[Cascadilla]

How did you agitate the film in the developer? This could be too much agitation resulting in more developer flowing through the sprocket holes in the film.

 

[caila77]

How did you agitate the film in the developer? This could be too much agitation resulting in more developer flowing through the sprocket holes in the film.

I used the same procedure I always use for fomapan 200@320 iso:
HC-110, 20°C, 7 minutes, shaking for the first 15 seconds and then inverting twice every minute. Dilution 1:50.

 

[Dayrell bishop]

A few years ago I had similar problems with fomapan , I stopped using a stop bath and now use only water as a stop bath .

 

[Dayrell bishop]

Ignore my last post I thought you where talking about the pin holes.

 

[Alpsman]

I had similar when I develop color negatives.
First batch was agitating every minute for four times as I did with my B&W films. I flipped the tank 180°, waited untill all the air bubbles raised through the developer and then turned it back. Then I rotate the Tank for 90° and agitate again. Every minute four agitations.
There were these "stripes from the sprocket holes.

Next batch I rotated the spools in the tank continuously -> again stripes from the sprocket holes.

For the third batch I rolled the tank continuously on the table and again - I had these stripes.

Then all the developer was used up and all the exposed film was used up.
I've tried three different agitation methods with the same result.
So therefore I could not say, that it was a specific agitation method.

But I dont have these stripes from the sprocket holes when I develop my B&W films with four agitations per minute.

Now I'm not wiser than before :-(

 

[caila77]

After searching online, I found some testimonials from people who had the same problem, attributing it not to the developing process, but to the fixing process, and specifically to the agitation during the fixing process. In fact, I hadn't paid much attention to the fixing process, distracted by family matters, and hadn't agitated it except at the beginning. At this point, I took the negative and repeated the fixing and washing process... and the streaks disappeared.

 

[Freakscene]

It is from non-random agitation during development. Fixing cannot cause surge marks because fixing only removes unexposed silver; it can’t remove more with more or different agitation if you fix to completion.

Some films are more sensitive to surge marks from agitation during development. Foma 200 is one of them.

 

[caila77]

I understand your observation, but the streaks disappeared after I repeated the fixation. I hypothesize that those streaks were due to incomplete fixation from an overly old chemical and/or insufficient agitation.?

 

[Freakscene]

I understand your observation, but the streaks disappeared after I repeated the fixation. I hypothesize that those streaks were due to incomplete fixation from an overly old chemical and/or insufficient agitation.?

View attachment 4889798

It can be from incomplete fixing, but then they are not surge marks, the film is just underfixed. Unexposed silver is always a different colour; once you know what you are looking for you can spot that instantly.

Mix up some new fixer, fix for longer, or monitor the remaining life of your fixer.