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photographic print format roughly the size of a French visiting card (6 × 9 cm; 2 1/3 × 3 1/2 in), traditionally imprinted with the n...
"Four-toned albumen print" Henry Peach Robinson (July 9, 1830 in Ludlow, Shropshire February 21, 1901) was an English...
Silver mirroring is a bluish metallic sheen appearing on the surface of silver based photographs as result of ageing. One of the photographi...
Albumen print from wet collodion negative 1864 24 X 29.7 cm Musée d'Orsay ... admired by Lewis Carroll that he collected the work....
about me "work and lifestyle"
Tuesday, 6 September 2011
handle with care
[ ... ] A photograph can be one of many processes in which light-sensitive media are employed to create a visible image.
The prevalence of photographs allows us to forget that they are potentially fragile objects that can be easily damaged by careless handling, improper storage, and exposure to environmental influences such as light, humidity, and temperature.
In caring for a photographic collection, it is important to know that various components comprise the structure of a photograph. The interaction of these components, with each other and with their environment, has a lasting effect on the longevity of the image. Most photographs consist of a final image material, a binder layer, and a primary support. The final image material—commonly silver, platinum, organic dyes, or pigments—creates the image we see. The binder layer is a transparent substance such as albumen, collodion, or gelatin in which the final image layer is suspended.
The binder and final image material are applied to a primary support, usually paper, glass, metal, or plastic. Although many photographs have this three-part structure, individual images may have additional components. For instance, color, coatings, original frames, and cases need to be considered as part of the photographic object.