I have some pictures from 2019 that I took on a disposable camera that are starting to collect these strange pinkish-dots all over them. The photos: https://imgur.com/a/WGY9TY4 For some context, these photos were pristine up until a few months ago. These photos have been stored on the wall in a room that gets a half decent amount of sunlight but the photos aren’t facing towards the windows at all. What could be happening and how can I prevent these photos from further degradation?
Printed photos aren’t necessarily stable for an indefinite period of time.
Afaik, degradation can be due to residual printing chemicals like fix not having been fully removed from the paper, for example if not washed for long enough after processing.
Making archival prints includes some additional steps to reduce the risk of residual chemicals causing degradation later, but something like a 1hr photo place probably isn’t taking those steps.
If you still have the negatives, the best thing to do would just be to get some reprints made from those.