Stains in the negative

[chicken schnitzel]

Hello all, i have been lurking long time but now i come with a question that is been bothering me

. I have processed these negs and i noticed all those dark stains (light color in the negative), is it because the emulsion is expired or bad stored? is because exhausted chemicals or oxidated (should not be the case i hope coz they were quite fresh)? Are a cross contamination stain like a previous wetting agent in the tank?

 

[koraks]

Perhaps some more information would be nice:
1: Any image context is missing; how big are these spots? Where are they on the affected negative(s)?
2: What kind of film? Brand, film type, format, expiration date, storage conditions?
3: How where these processed and by whom? What kind of processing/chemistry etc.?

At this point, your guess is as good as mine. Some kind of backing paper imprint problem is a possibility that comes to mind, but obviously only if this happens to be 120 format film.

 

[chicken schnitzel]

sorry you are totally right... more info: 120 film, lomo 100, processed in fuji chemicals, these spots are small scarrederd all over the first 2 pics, no idea about storage and expiration coz the roll is not mine. hope you find useful...

 

[koraks]

these spots are small scarrederd all over the first 2 pics

Probably a backing paper issue, likely as a result of poor storage conditions and/or old age.

lomo 100

For problem-free experiences, I'd recommend sticking to Fuji and Kodak. The rest is hit and miss, really, when it comes to color film. For various reasons. If it's within date, it's still Fuji or Kodak, but rebranded and possibly tampered with (e.g. Cinestill/Kodak Vision, or Lomo with various kinds of 'pre-exposure') increasing the likelihood of problems.

 

[chicken schnitzel]

it makes sense... i will check the other batch of negatives i developed together to see if the same issue comes out with them... thank you for your kind answers

 

[koraks]

Your welcome, I hope the owner of the film isn't too unhappy about the outcome.