I have a studio postcard photo of an uncle taken in 1909. The edges and shadow areas of the photo are turning a dull, bluish color. When scanning the areas are very blue. Any suggestion is how to eliminate or filter out the bluish color? I use Adobe and PhotoImpact. Any idea what this type of photo/print this might be? I have a few similar photos, but they have turned black or gray rather than blue. Thanks, George