Troubleshooting in processing

Jeremy Saint-Peyre

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• Apr 10, 2022

• #1

Hello,

I processed a roll of fomapan 100 in 120, at 1+100 in rodinal and let it dry for 24h. I have some deffect on the upper (lower) side of the emulsion :


But it seem there is two problems, on the following picture in portrait orientation, one problem (the foggy part) remain on the upper side, the other one (the sharp pinch/drops) keeps a top->bottom direction.

I think they two problem have separate causes. The first one i think if from the manufacturing. The second one is a mishandling when i processed...

Camera is a Koni rapid omega 200.

Any clue on what and how to fix this issue ?

Thanks,

Jérémy

 

koraks

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• Apr 10, 2022

• #2

Mostly bubbles, usually due to insufficient developer volume and sometimes remnants of surfactant (photoflo) from a previous session in the tank.
Just use 50ml or so more developer than you're doing now. And tap the tank firmly on the table/counter after inversions. Agitate sufficiently.

 

250swb

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• Apr 10, 2022

• #3

Along the top edge bubbles, either not enough dev or frothing. The other marks look like contamination but could equally be even more bubbles.

 

pentaxuser

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• Apr 10, 2022

• #4

Well, whatever it is, the lady seems to be troubled by it as well

pentaxuser

 

OP

OP

Jeremy Saint-Peyre

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Geneva

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• Apr 11, 2022

• #5

koraks said:

Mostly bubbles, usually due to insufficient developer volume and sometimes remnants of surfactant (photoflo) from a previous session in the tank.
Just use 50ml or so more developer than you're doing now. And tap the tank firmly on the table/counter after inversions. Agitate sufficiently.

Click to expand...

Allright, i always use patterson (300ml/135 - 500ml/120) and it's the first time it happen to me in... ho shit : 15 years... times fly...

Thanks, i'll give a try to overfill a bit !

 

MattKing

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• Apr 11, 2022

• #6

FWIW, the residue on reels can be from photo-flo, or it can be from other contributors such as gelatin from film.
And it can build up incrementally over time.

 

Sirius Glass

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• Apr 11, 2022

• #7

MattKing said:

FWIW, the residue on reels can be from photo-flo, or it can be from other contributors such as gelatin from film.
And it can build up incrementally over time.

Click to expand...

For that reason, I remove the film from the reels before I put the film in PhotoFlo in a separate container. That beats scrubbing reels with a toothbrush every time I use them.

 

George Collier

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• Apr 12, 2022

• #8

+1 for removing the film from the reels before the photo flo dip, which is a dip for me, see-sawing left to right for 30 sec, distilled water, drain off of one corner, then hang. Then I use a cotton pad called Webril, presoaked in the flo, pressed dry as much as I can, then one single long wipe on either side of the film top to bottom, then left alone. Film dries as soon as it can, no streaks, dust, scratches ever.