Collodion Negatives or Positives Copied from Collodion or Paper Positives Towler, John. The Silver Sunbeam . Second printing, Feb. 1974. IN this chapter will be described the method of copying photographic or typographic prints. For the purpose of copying I invariably use the full blaze of the sun .
Some artists pretend that the system is false.
All the contrast that can possibly be obtained in the copy, exists already in the original. Upon a light built table or board, two inches wider than the camera, nail down on either side a ledge of wood, within which the camera can slide longitudinally. This last piece is the holder of the print to be copied. By the construction it will be seen that the holder admits of motion vertically and horizontally, and that thus the print can be accurately adjusted in a correct position in front of the lens, so that the center of the print and the axis of the lens coincide. The print, too, will thus be parallel with the ground glass in the camera.