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 #:
000294
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
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

March, 1930] SURFACE TREATMENT OF SOUND FlLM 277 the applicator, the viscosity of the wax is increased by virture of being cooled and too much wax is applied. It was found that paraffin wax could be applied to the perforation area of motion picture film in the form of a solution of the wax in a non-inflammable solvent such as carbon tetrachloride. It is not necessary to buff the waxed film in this area after evaporation of the solvent because the optical condition of the edge is of little importance. FIG. 1. The wax solution applicator. The thickness of the applied film can be controlled readily by changing the concentration of the solution. In order to test the suitability of this method, various concentrations of the paraffin solution were applied to sound record prints and these were tested by running through a projector-reproducer machine and noting whether wax flaked off or accumulated in the machine. Similarly treated samples were run on projection machines until complete breakdown of the film in order to determine their comparative resistance to wear. Equipment for Application of Wax Solution. — The first device used for application of the wax solution to the edges of motion picture film onsisted of two smooth, steel disks which dipped partly in the wax •lution contained in a small tank. The film was led over these disks