The practical printer : a complete manual of photographic printing (1874)
Hearn, Charles W · Philadelphia : Benerman & Wilson · leaf 55
45 THE PRINTING-BOARDS. The springs meet the backboard of the smaller frames in one place, which is generally the centre of the frame ; but in the large frames they meet the backboard in tivo places (Fig. 17), and for convenience are not attached to the backboard, but to the frame itself, swinging… … The backboard should have soft pieces of cotton flannel glued to it, napped side out, on that side of course which is to be placed nearest to the negative. This gives a soft cushion to the backboard, which is a desirable thing. As a general thing, loose pads are placed in the board on to the…
Photography -- Printing processes · Photographs on porcelain
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
