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?
pink (kodak/lucky) or light blue (fujifilm) is the color of undeveloped emulsion. The photo paper is starting to break down. Was it a bad wash? Possible but not likely. Bad color developer? Possible but there would be streaking and not so much spotting. It’s more like a bad batch of photo paper. Scan from negatives to reprint your photos is the best option.
The other (remote) possibility is degration from reflected sunlight or ultraviolet light, like through crystals or glass at an opaque angle that dispurses the light.