Improve faded colours

Often old prints will become faded and bleached out after time. A good place to start is the Auto-Color and AutoTone commands, found under the Image menu. If these don’t fix the problem, try dodging and burning to add depth to the tones over the faces. Duplicate the background layer then grab the Burn tool and set it to Range: Shadows, Exposure 5% in the tool options. Zoom in close to the faces and burn the darker details to make them stand out.