Consequently, images on printing-out papers - which include salted paper prints, albumen prints, collodiochloride papers, and certain silver gelatin prints - are more susceptible to image deterioration caused by chemical attack than are photographs on developing-out papers.Īlthough RC prints are developed-out, they possess special properties related to the plastic coating on either side of the paper base. Each is manufactured and processed differently, which results in differences in size and shape of the silver particles in the image. This group of prints may be subdivided into those printed on printing-out papers and those on developing-out papers. Like all photographic records that contain elemental silver, the image is susceptible to discoloration if exposed to aggressive chemical reagents even though it is on a stable support. They are sometimes referred to as baryta papers Endnote 1. Also, the silver particles that form the image are susceptible to an oxidation reaction that leads to discoloration of the picture.įibre-base silver prints are made on a paper base that ranks among the highest in quality and permanence. Because of the absence of a distinct image layer, they are liable to suffer from abrasion. These prints are more sensitive to agents of deterioration than are later materials. Little is known about the properties of early salted paper prints. These photographs are often collectively referred to as "silver prints."
Prints in the last two groups have an image layer coated on one side of the paper support.
Salted paper prints on a paper base not specifically formulated for photographic purpose they have no distinct image layer in a binding medium.Photographic prints with silver images fall into one of three categories, according to the nature of the support material: With the exception of pictures dating from the beginning of photography (the so-called salted paper prints from the late 1830s to the mid 1860s), the image silver is embedded in a thin layer that may consist of albumen, collodion, or gelatin. This Note is concerned with prints on paper or on resin-coated (RC) paper for which the image-forming substance consists of microscopic particles of silver. There are many kinds of prints, each with its own format, process, imaging materials, image tone, base material, surface gloss, and texture.
#Silver gelatin print rc paper pdf#
( PDF Version, 164 KB) CCI Note 16/4 is part of CCI Notes Series 16 (Care of Photographic Materials) Introductionīlack-and-white photographic prints are found in most museums, art galleries, and archives.
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