Bromide paper : instructions for contact printing and enlarging (1896)
Just, E. A · Bradford : P. Lund, Humphries · leaf 43
at the automatic attachment can easily be dispensed with. The operator, Avhen printing, has only to note the duration of the exposure from one turn of the crank to the other. Supposing the exposure requisite to be as much as eight seconds, and allowing two seconds for the time occupied in turning… … Fig. 12. A detailed description of Schlotterhoss's apparatus must be dispensed with here, suffice it to describe the different movements made by each turn of the crank. First, the flap which covers the sheet of plate glass upon which the negative is firmly fixed, closes. Next, the pressure board is…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
