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

Page scan 000387 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 #:
000387
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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382 K. FAMULENER AND E. LOESSEL [J. S. M. p. E. In Fig. 9 there was a marked decrease in speed with age amounting to approximately 7 printer points in 13 weeks and rising to about 15 printer points in 39 weeks. Grain projections showed no discernible difference between the aged and freshly exposed film. The results on the two films are best shown in Table I. TABLE I Latent Image Age before Development (weeks) Film No. Change in Speed 8 Gamma 0 2.06 13 Vy si* 2.04 26 Vysl + 2.12 39 Vysl + 2.12 48 2 points -f 2.08 Film No. 9 Change in Speed (points) 7 + 12 + 15 + 15 + Gamma 2.20 2.00 1.90 1.66 1.66 *"Vy si" = very slight. DEVELOPED OWEEKS AfTER EXPOSURE. . Loo E -3 .6 .9 1.2 US X8 XI 2+ *7 3.O J.j FIG. 7. Latent image age effect on infrared motion picture negative film. GENERAL RESULTS Intensification or Regression of the Latent Image with Age. — The test results obtained under the different emulsion groups indicate that the intensification or regression of the latent image varies with several factors. First, we find, as Heisenberg contended, that the intensification is most pronounced with color sensitized emulsions. All the sensitized negative materials show a speed increase of from