I am amazed by all the replies. All I can tell is that they are mounted slides and positives. I'm sure they are "store bought". Have seen jumbo slides, called Super 35mm ??, in the past with this same look from the Grand Canyon NP store, and elsewhere.
Gary, Ai studio 8 has the same tool set as the Archive Suite.
I can post a photo, but it will be a pink&white.
Can remove/reduce the red using SF8 tools, but never have gotten a good photo. Why would National Parks and others sell slides that are seemingly impossible to tame?
Was hoping someone knew the taming trick.