I have a number of photos that were scanned from slides. These images are 50 or more years old and the slides degraded to this majorly red-colored shift. How do I recover them to some degree of "normal"? Just need a few suggestions to set me on the right path.
I believe trying to return this image to authentic color is a lost cause. Rather, I suggest you convert each into a grayscale image or a duotone. (This quick sample used Image > Adjustments > Black & White followed by a Curve adjustment. I believe local Dodging and Burning would improve the result.)