Modern heliographic processes : a manual of instruction in the art of reproducing drawings, engravings, manuscripts, etc., by the action of light : for the use of engineers, architects, draughtsmen, artists, and scientists (1888)
Lietze, Ernst · New York : Van Nostrand · leaf 40
sed, by beginners, to prac- tice with. The ground glass plate, in this frame, will necessitate a some- what longer exposure, for copying, than a clear, transparent plate would. A Cheap and Con- venient Printing Frame Figs. 13 and 14. of small size, similar in construction to a transparent… … Fig. 15. to be copied, or the sensitized paper, may be longer than the frame and project over the ends of it. The projecting part of the paper may be rolled up, wrapped and protected from the action of light. This 16
Photographic reproduction of plans, drawings, etc · Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
