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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 36

An illustration from 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, leaf 36
12 MODERN HELIOGRAPHIC PROCESSES. journaled. The paper to be sensitized or coated is pasted together (preferably with shellac varnish) to form an endless band, and is placed over the rollers C and E. The stems, G, are pressed upward by springs (invisible in the sketch). The nuts, H, serve to adjust… … roller C are opened, and the rollers C ! and E taken out. Then the paper is placed on the roller E, the roller put Fig. 6. back in its place, the roller C slipped in the endless paper band and let down easily, so that the paper will be tensioned by the weight of roller C. Then the nuts H are…

Photographic reproduction of plans, drawings, etc · Photography

Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.

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