Bromide paper : instructions for contact printing and enlarging (1896)
Just, E. A · Bradford : P. Lund, Humphries · leaf 132
126 BROMIDE PAPER. which receives the direcft rays of the sun, and transmits them diffusedly to the interior. Here the li^^ht may serve either direcft, for illuminating the negative, or through a condenser. Light-Trap with Matt Screen. — In order to obtain a more powerful cone of rays issuing from… … flatly to the window, a so-called light-trap may be suitably employed. This is made in the shape of a funnel as shown in fig. 24. It is coated inside with white enamel, and the opening, which is made at an angle of 45°, is covered over with tissue paper. This arrange- ment is attached to the wooden…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
