What went wrong? Foma 200 development.

[peppard]

Mark, how long did you develop the film for and how often did you shake/inverted the tank?
Thanks

 

[markjwyatt]

Mark, how long did you develop the film for and how often did you shake/inverted the tank?
Thanks

8 1/2 minutes (20.5 Deg. C) 5 inversions/5 sec. every 30 seconds

 

[lynnb]

Could this be a result of the ocean air interacting with the film? I had two rolls of film with similar issues. The only thing that I could think of was that the two rolls were loaded into my Hasselblad when I was at the beach... While the beach photos look okay, the wedding photos from one of the films were completely ruined. The rest of the wedding photos from that day were fine, the only film with issues was the one loaded near the ocean. I think I see the ocean in one of your pics, so perhaps that is what is happening?

Hi Pavel, my film was loaded inside my house, so I can rule that possibility out. Thanks for the suggestion. Please accept my commiserations for the ruined wedding photos - I hope the bride and groom forgave you!

 

[lynnb]

I just developed a roll of 35mm Fomopan 200 in HC110 1:63 (first roll hand developed in decades). I made a couple of errors, the worst is I did not have 6ml of concentrate in the soup as recommended (I had 3.5 ml), but things still worked out ok, if anything a little muddy (but there are other factors including the subject matter):

https://www.flickr.com/search/?user_id=157638541@N07&view_all=1&text=fomopan 200 exakta

Mark, despite the dilute developer the results look quite acceptable. Congratulations on getting back into developing your own!

 

[lynnb]

Hi Lynn,

it's sad to see your film in this way.

I had a similar problem with some FP4 films (120). I think it has to see with temperature and humidity changes... but I don't know.

Hi Xabier, thanks - I agree the marks on your film look similar to mine.

Chris from Blanco Negro has sent my samples to the factory for the technicians to examine. I'll update this thread when I hear back from them.

Cheers,

 

[lynnb]

I have received a reply from Dana at Foma:

Hi Lynn,

I would like to inform you about statement regarding defect on by you used films.

So, this defect was probably caused by increased relative humidity. During storage or during insufficient acclimatization, possibly in connection with a higher ambient temperature.
Degradation of sensitization of the film corresponds to the structure of duplex.

The film of the same emulsion number from our file cabinet was fine despite the expired guarantee date.

It is necessary to observe the storage conditions as best as possible. When storing material, avoid co-storage with chemicals. Proper acclimatization of the material is also important.

We believe that when using our films, you have maximum effort to adhere to all of the above, however, in this case there was probably something that did not keep the properties of the film in good condition.

At the same time we believe, that this experience does not discourage you from using our materials for which we are very grateful and we thank you for it.

We wish you a lot of success and a relaxing Christmas period.

With best regards

Dana
Sales Manager
Export Dpt.
FOMA Bohemia Ltd

This makes sense to me. In future I'll give the film plenty of time to reach room temperature, and will avoid re-freezing film that's been previously frozen and then thawed (sometimes I pull a film out of the freezer to thaw, and then later change my mind and put it back into the freezer).

 

[retinax]

Just from following the discussions on this forum, it does seem like most (not all) cases of mottled 120 film involve freezer storage. I avoid it altogether and only rarely even put film in the fridge.

 

[charjohncarter]

Thanks for the reminder! It's happened each time on the last frame in the roll. This time I still have the backing paper - I checked and there's a hole there:

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Recently, I was checking for light leaks on an Isolette II. After I exposed the last frame I forgot to close the red window as I rolled the remaining paper backing to completion. That was the cause of my circle on my film. It bled unto the last frame. So keeping with tradition in never get 12 images with Fomapan.