Bromograph Agfa. Abaut1940.

The bromograph was used in the photo lab to produce contact print from plates 13x18 and photographic film. The device is a wooden box with a light bulb inside, closed at the top by a metal cover. An external switch allows switching on and off the bulb. The metal cover has a fixed bottom with window closed by a ground glass, and a mobile part. To make a contact print, a plate or a fil is placed above the ground glass covered by a sheet of photosensitive paper. The lid is then closed and the light is switched on for the desired exposure time. After the exposure the photosensitive paper is removed and processed passing it though developer and fixing bath.