mold or chemistry issues ?

Edi · Feb 22, 2021

Hi guys,

I've been getting this dots marks on my color negatives (135 & 120) but not sure if its mold in the negatives or chemistry issues. sometimes some frase are worst than other and other frames don't seem to have the problem visible.

have you experienced any issues like this?

koraks · Feb 23, 2021

With 120 this is usually a backing paper problem. If it also occurs with 135, it's a little more mysterious; might be moisture condensate on the film if it was taken out of cold storage (fridge/freezer) and loaded into the camera when still cold.

Edi · Feb 23, 2021

koraks said:
moisture condensate

the film wasn't fridged but it was close to a place with a small amount of moisture for a few months so I am considering that that might have been the problem.

koraks · Feb 23, 2021

It might be worthwhile to have a look at packaging and storage conditions. For example, if the 35mm was stored in their plastic packages with the cap in place, environmental moisture doesn't influence the film as the plastic package is pretty much airtight. But if the bare metal canisters were stored in high moisture conditions without other packaging to protect them, moisture may be a problem.

There could also be condensate problems when loading the film onto reels prior to development, to name just one more possible cause. And then there are several possible causes not related to environmental humidity or condensation, such as a proble with prewetting prior to development, remnants of wetting agent or conditioner on the tank or reels from previous sessions, etc.

There are quite a number of possible factors that play a role in this. I think your best bet is to analyze all the stages the film has gone through to identify possible culprits.

Edi · Feb 24, 2021

koraks said:
It might be worthwhile to have a look at packaging and storage conditions. For example, if the 35mm was stored in their plastic packages with the cap in place, environmental moisture doesn't influence the film as the plastic package is pretty much airtight. But if the bare metal canisters were stored in high moisture conditions without other packaging to protect them, moisture may be a problem.

There could also be condensate problems when loading the film onto reels prior to development, to name just one more possible cause. And then there are several possible causes not related to environmental humidity or condensation, such as a proble with prewetting prior to development, remnants of wetting agent or conditioner on the tank or reels from previous sessions, etc.

There are quite a number of possible factors that play a role in this. I think your best bet is to analyze all the stages the film has gone through to identify possible culprits.

thank you! I'll have to check the process more closely and I'll also buy new film to see if I get the same problem,

mold or chemistry issues ?

Edi

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