The talkies (1930)

Record Details:

Title:
The talkies
Date:
1930
Publisher:
London: Crosby Lockwood and Son
Volume:
The talkies
Leaf #:
000167
Language:
English
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
March 28, 2024
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THETALKIES 105 found when the first sound-tracks were run through ordinary processing machines ; this took the form of distinct hum in the loudspeaker. A series of experiments showed this to be due again to the ever-present enemy, stain. The trouble was traced to the fact that a certain amount of developer was caught up in the perforations at the side of the film, and when the film was lifted out of the developer, this emerged from the perforations and drained on to the sound-track, causing stains due to the slight extra development which it effected wherever it fell. This has now been overcome by plunging the film straight into a bath of a special chemical which destroys the power of any developer which may be left on the film and prevents it doing any damage if it does emerge after the film has left the tank or tube, as the case may be. Particular care has had to be taken to see that the water in these processes does not contain any small particles which, by being deposited on the film, may cause background noise. The difficulty of the different degrees of contrast demanded by the sound-track and the picture is greatly simplified, from the developer's point of view, if separate films are used, because it is then possible to develop the two films to their indi