Making a simple silver chloride salt print begins with the selection and preparation of the paper. Waxed salt print from collodion negative. Sleepless, © 2008 France Scully Osterman. The result is that the shadow areas are held back slightly allowing the highlights of the picture to print. This means that thin areas of the negative allow the light to quickly darken the paper and block light from reaching the lower layers of the sensitive surface. Printing out papers rely on a technique called self-masking. A good print for these papers requires a dense negative with good shadow detail and clear base in the deepest shadows. For this reason a 4 x 5″ or larger negative is usually preferred. Printing out papers can only be contact-printed. Collodio-chloride is actually the most stable silver printing process because the nitrocellulose binder hermetically seals the silver from the harmful atmosphere that fades all silver base photographic prints. But with proper processing they will stand the test of time as well as the originals. It is fixed, washed, dried, and preserved in much the same way.īecause the silver particles of printed out images are a much finer size than those of developed out prints, they are more susceptible to deterioration. Once the image has been printed and toned, the rest of the procedure is like handling a silver print. The basic light-sensitive substance used in all of these papers is silver chloride with an excess of silver nitrate. Gelatino-chloride papers suspend the silver in a gelatin layer and collodio-chloride use a binder of cellulose nitrate. In salted paper the silver is held by the fibers of the paper while albumen papers use egg whites as the binder. There are several different printing out papers including salted paper, albumen, gelatino-chloride and collodio-chloride, differing in the medium used to suspend the light-sensitive substance and if the sensitizer is applied in the salting solution (as in an emulsion) or as a second step. The printing technique is simple: the paper is contact-printed with a negative using the sun for a light source to make a visible image without development (a UV lamp, available from grocery and hardware stores, can also be used). Indeed, prior to the 1880s, these papers were the most popular method for obtaining photographic prints. The use of printing out papers is a time-honored method for making inexpensive prints without a darkroom.
The term has since been applied to any paper that requires ultra violet light to form a complete image. were introduced in 1891 by the Ilford Company for their gelatin-chloride papers. The term “printing out paper” and the associated initials P.O.P. If you lose hope then you will miss opportunities to plant a seed.” Ruth Bernhard “You must always believe that there is fertile soil for your ideas. An excerpt from Steve Anchell’s book – The Darkroom Cookbook on Printing-Out Processes.
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