Journal of the Society of Motion Picture Engineers (1930-1949)

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
000253
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
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240 J. M. CALHOUN Vol 43, No. 4 compromise, Where possible, the drying temperature should not be allowed to exceed 85 F. THE MECHANICAL PROPERTIES OF FILM The mechanical properties of motion picture film, such as tensile strength, elongation, folding endurance, tearing resistance, and brittleness are important because of the severe wear that the film 40 30 §20 LJ 10 FIG. 5 10 15 LOAD I03 LBS/IN2 . Typical load-elongation diagram for cellulose derivative films. must withstand, particularly in the case of release positives subjected to repeated projections. The elastic and plastic properties of the film, such as modulus of elasticity and cold flow, are equally important, not only from the point of view of wearing quality, but also as they affect the dimensional stability of the film and its susceptibility to curl and various other film distortions. Theoretical. — It is necessary here to describe briefly the mechanical behavior of plastic materials, of which film base is typical. If any material under load (either tension or compression) undergoes a deformation which is independent of the rate of loading and dis