![]() Instead, use folders, subfolders, paper tabs or envelopes to maintain associations. ![]() Remove paper clips, staples, fasteners, rubber bands, and Post-It® Notes used to label or organize photographs these can damage the emulsion image. Consult a photograph conservator for further guidance. Do not dust a torn photograph, one with cracked or lifting emulsion, or one that is highly significant.Brush or blow at an angle working from one corner or edge across the item. When dusting, always support the photograph by gently holding it on a flat surface.Canned air should be avoided due to the force of the air stream and potentially damaging propellants. A hand operated puff-style blower can also be used to reduce dust on photographic records. If there is visible dust or debris on a photograph that might scratch the image, brush it lightly with a clean, soft brush. ![]() Many photographs have a slight natural curl do not back roll a photograph in an attempt to flatten it. Support a photograph with two hands and avoid bending or curling the record.Many photographic emulsions and digital prints can be easily scratched, cracked, or dented. Handle each photograph by its edges and avoid touching the image area even when wearing gloves. To the extent possible, clean nitrile or cotton gloves should be worn when handling photographs. Oils, salts, and other skin deposits can degrade the image over time. Additional preservation guidelines for film-based negatives and positives can be found on our website. The following are general guidelines for preservation of photographs. ![]() Among the more common photographic processes that are found in NARA holdings are daguerreotypes, ambrotypes, tintypes, salted paper prints, albumen prints, glossy and matte collodion prints, cyanotypes, platinum prints, silver gelatin printed-out paper prints, silver gelatin developed-out paper prints, chromogenic color prints, polaroids, inkjet prints, lantern slides, glass plate negatives, and film-based negatives, transparencies and slides. The photographic holdings of NARA’s Still Picture Branch alone include over 14 million analog prints, negatives, slides and transparencies and over three million digital photographs in electronic file formats. Top left: albumen print Top right: cartes de visite (an albumen print mounted on a paper card) Bottom: Silver gelatin print.Įver since the first true photograph was made in 1827, a wide variety of processes and supports have been used to create photographic images. In North America, the first photographs produced were daguerreotypes beginning in 1839. These images show different 19th century photography types. Enlarge Different Examples of Historic Photographs ![]()
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