Unfortunately, even the best photograph will deteriorate over time. To keep your grandparents’ photos in good shape, take them out of their frames. Then put each photo into an acid free envelope or a mylar envelope. These inert coverings will protect them from the damaging acids that are found in old photo-binders or regular envelopes. Keep your photos out of direct light, and store them in a cool but dry place. If you prefer to keep your photos on the wall, make sure they are not near a lamp, a window, or a heat vent. Hallways are the best place to hang old photographs.