Old photos will decay no matter what and you should scan and digitally restore them if you want to keep them. Plan before you scan by considering the source material and cleaning the scanning bed. Slides and negatives are preferable to prints. Never use tape a photo or use liquid to clean it. Set up your scanner software to create 300 dpi prints for any maximum print size. When the scanner software asks you to specify the scanning resolution of the original, remember that slides and negatives will require a high scanner resolution. Save the photo as a TIFF or JPEG at the highest quality with the lowest file compression.
What we are reading:
http://www.pcworld.com/article/124718/digital_focus_scanning_old_photos.html
What we are reading:
http://www.pcworld.com/article/124718/digital_focus_scanning_old_photos.html