Tips: Photographs
Modern coloured photographs are developed using organic dyes, while older, historic processes generally involved the use of silver metal and chemicals. Photographs, especially modern, colour ones, are very susceptible to damage caused by light and air pollution. These can cause photographs to fade at an uneven rate, cause yellowish stains, and in extreme cases, cause the entire image to disappear. Modern photographs are not as affected by high humidity as historic ones are. High humidity will cause tarnishing and corrosion in photographs that contain silver. Do not write on or attach labels, stickers, etc. to photographs. These will eventually cause damage. Do not roll large or oversize photographs. This can cause permanent damage as the underlying support is not as flexible as paper. Do not try to clean or repair photographs. Trying to remove corrosion or tarnish from historic photographs will cause increased damage to the image. Do not use tapes, glue, or other products to repair rips or tears. Contact a professional conservator.
Handling: Wear clean, cotton gloves when handling photographic materials, as the acids and oils in your hands will cause damage. When handling large photographs or those on glass supports, make sure they are adequately supported.
Storage: Modern photographs of a standard size should be housed in photo albums with Mylar or polyethylene pockets. Do not use photo albums with self-adhesive pages, as photographs will become permanently adhered. Negatives and slides should also be stored in Mylar or polyethylene pockets designed for their size. For oversize or oddly shaped photos and those on glass supports, store in acid-free boxes or envelopes/folders. If the photograph is on a glass support, insure that it is adequately padded against breakage by using acid-free tissue. Photographs are best stored in the dark, at a cool temperature.
