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

Page scan 000346 from Journal of the Society of Motion Picture Engineers

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 #:
000346
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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1948 SAFETY FILM SUPPORT 333 at the present time for some Eastman films. These include safety release positive film, in both 16-mm and 35-mm widths, as well as the 32-mm width film, later to be converted to 16-mm product; fine-grain duplicating positive film, type 5365, in both 35-mm and 16-mm widths; sound-recording film, type 5373, in both 35-mm and 16mm widths; and high-contrast positive film, type 5363, in 16-mm width. In addition, the new base is being used for certain professional 35-mm duplitized-color positive films. CELLULOSE CELLULOSE TRIACETATE ACETYL CELLULOSE TRIPROPIONATE PROPIONYL Fig. 1 — Chemical composition of cellulose esters used in safety film base. A, acetone-soluble cellulose acetate; B, high-acetyl cellulose acetate; C, cellulose acetate propionate. Careful evaluation of this base for 35-mm film indicates it should be suitable for professional motion picture positive and negative stock, for which cellulose nitrate base is now employed. The results of these tests are summarized in the following experimental sections. PROPERTIES OF FILM BASE Consideration of the physical properties of the film base will serve as a comparison of the high-acetyl cellulose acetate support with nitrate and safety products which have been in standard use (Table I) . In these measurements both lengthwise and width wise directions of the support have been included because of the slight difference in these two directions. In certain cases such differences may be of importance.