ABSTRACT
The basic light-sensitive substance used in all of these papers is silver chloride with an excess of silver nitrate. Once the image has been printed and toned, it is fixed, washed, dried, and preserved in much the same way as a silver print. Because the silver particles of printed out images are a much finer size than those of developed out prints, they are often more susceptible to deterioration. The salting formula not only prepares the paper to receive the silver nitrate but also creates a finish that keeps the image from forming deep into the fibers of the paper. Salt prints are made with either sodium chloride or ammonium chloride. The usual technique for brush coating the paper is to make tick marks with a pencil at the corners where the negative will be positioned. Tape or pin the corners of the paper to be coated onto the coating board.
