Handbook for motion picture and stereopticon operators (1908)

Page scan 00033 from Handbook for motion picture and stereopticon operators

Record Details:

Title:
Handbook for motion picture and stereopticon operators
Date:
1908
Publisher:
Washington, D.C. : The Knega Company, Inc.
Volume:
Handbook for motion picture and stereopticon operators
Leaf #:
00033
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Niles Essanay Silent Film Museum
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Date Added:
May 02, 2025
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Operator's Handbook 27 DEVELOPMENT. Developing Machines. Having exposed the film in the camera, the next step is development. To develop this strip, carrying on its gelatine surface some 1600 latent images every 100 feet, is worthy the effort of the most patient photographer, for each picture must have the same density, remain without stain throughout, and must be handled so as not to be abraided in any part of its length. Drum Method. The method most in use consists in winding the film spirally while dry upon a large drum, the latter supported free to rotate in a semicylindrical tray into which the developing fluid is poured. These drums are usually 3 feet or more in diameter and 6 feet or more in length, and driven by a motor, although a crank may, of course, be used. A drum 2 feet in diameter and 2 feet long holds 100 feet of film laid close. Pin Cross-Arms. No developing device is, however, so suitable for travel (and many operators prefer it at home) as a pair of brass cross-bars having vertical pins