this post was submitted on 23 Nov 2023
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Photography
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A place to politely discuss the tools, technique and culture of photography.
This is not a good place to simply share cool photos/videos or promote your own work and projects, but rather a place to discuss photography as an art and post things that would be of interest to other photographers.
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If you still have the negatives, get them scanned.
If you don't have those negatives anymore, get your photos scanned asap and retouched to remove those defects. Some could be easy to remove, some could be a bit more challenging depending on the location in a picture (removing a red dot in a blue sky is way easier than removing those on complex structures).
It could be chemicals not washed out during development (as someone else already mentioned), could also be dust particles (like some chemicals in powder form, concrete dust, ...) in combination with high humidity.
If you print images to have them last long (really long like tens of decades) have them printed with Canon or Epson fine art peinters on high end papers. Chemically developed prints will fade way faster. (source: Wilhelm Image Research)