3
\$\begingroup\$

I recently started using a Fuji GW490 with Portra 400 film. Having got the film developed, some of the areas out of focus (or smooth gradient areas) appear to have a 'splotchy' pattern of lighter dots that doesn't necessarily look like normal film grain. Perhaps the film is underexposed/expired? Possibly it could be how the lab handled it as I had a few other rolls come out fine.

I scanned using an Epson V600 with Epson Scan software, 48-bit TIFFs. enter image description here enter image description here

\$\endgroup\$
1

2 Answers 2

1
\$\begingroup\$

The diffuse dot patterns look like emulsion reticulation. It is damage to the emulsion usually caused by heat during development, but can also be an artifact of old film.

They don't look like scanner artifacts because the dust and hairs on the scan are perfectly sharp.

Have you looked at the original with at least a 20x loupe? Reticulation would be evident at that magnification.

If you can see something through the loupe, you can try cleaning the emulsion with PEC-12 and re-scanning. It's unlikely to be dirt from the looks of it, but you never know.

\$\endgroup\$
1
\$\begingroup\$

This is backing paper mottling, which sometimes happens with expired or badly stored 120 film. Heat and/or condensation is the cause. Something (presumably ink) is leeched from the backing paper onto the film, and it affects either exposure or development.

Occasionally, issues with quality control can make this problem happen or at least make the film more susceptible to it. Ilford issued a statement about this problem a couple of years back, and Kodak had some trouble for a while as well when they switched to a different backing paper.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.