Bromide paper : instructions for contact printing and enlarging (1896)
Just, E. A · Bradford : P. Lund, Humphries · leaf 125
awing-board (r) against the thumb-screw. By this it is possible not only to focus sharply with the drawing- board itself, but also to test for definition by pressing in the board. The author, in conjundfion with Herr M. Frankenstein, provided his drawing-board with a slightly curved surface, in the… … Fig. 19. The curvature thus produced is certainly i|-in. high was jammed, and not globular, which would be more only a cylindrical one. corredf to properly receive the projedfed image, but even this curvature greatly helps the sharpness at the corners. Attaching the sensitive paper upon this curved…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
