Practical cinematography and its applications (1913)

Page scan 000107 from Practical cinematography and its applications

Record Details:

Title:
Practical cinematography and its applications
Date:
1913
Publisher:
Philadelphia, Lippincott
Volume:
Practical cinematography and its applications
Leaf #:
000107
Language:
English
Collection:
Books
Format:
Books
Contributor:
Gerstein - University of Toronto
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
14
Date Added:
July 19, 2022
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72 PRACTICAL CINEMATOGRAPHY can be recognized even in the subdued light of the dark room because it has a matt surface, while the other side is glossy. The difference between the two sides can also be detected by the touch. When the end of the film has been attached to one end-bar the frame is turned, the film mean- while being permitted to slide out of the dark box, until the opposite end of the frame comes up. The film is passed over this bar, also between the first pair of guide pins, and once more, with a half-turn to the frame, the film passes along the second side of the frame back to the first bar, between the succeeding pair of guide pins, over the top and back again to the opposite bar, this process being continued until the coil of film is unrolled, when the second extremity is likewise fixed to the bar by means of a drawing pin. The film while being wound must not be drawn too tightly; at the same time it must not be too slack. When winding has been completed, the frame and film will have the appearance shown in the illustration facing p. 65. The guide pins in the end bars prevent the edges from overlapping or touching. The result is the presentation of two emulsion faces on either side of the frame and each face resembles the sensitized side of a dry plate. In winding the film upon the frame, and indeed during all the operations, the operator should be