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

Page scan 000389 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 #:
000389
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.

384 K. FAMULENER AND E. LOESSEL [J. S. M. P. E. curves intersect, is an ideal point at which to make comparisons of other age effects. Jausseran derived a logarithmic relation between the intensification and time lapse between exposure and development. This was later confirmed by Bullock. However, the ages considered were in units of seconds rather than weeks, the longest interval between exposure and development being five hours. Bullock implies further that the growth effect does not continue long and says, "Since the rate of .3 .6 .9 /2 AS /O 9-1 2.+ 2-7 FIG. 9. Latent image age effect on motion picture positive film no. 9. increase of the latent image may. . . .be taken as inversely proportional to the time, the practice of keeping exposed material for a few hours or overnight whenever it is desired to develop non-simultaneous low intensity exposures simultaneously, is to be commended." Our work extending over periods of months rather than hours showed a latent image growth far beyond the "overnight" period that Bullock mentioned. We can not establish a definite law for this growth but in general it approaches a logarithmic function. The effect is not, as Bullock states, general for all emulsions, since the positive emulsion discussed under Fig. 9 shows a definite regression, However, again we must remember that Bullock speaks in