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 #:
000413
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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396 DUNDON, BROWN, AND CAPSTAFF [j. s. M. p. B. In Fig. 2 is shown a similar series of test strips for a fresh, unused borax developer to which varying amounts of bromide were added. The effect of the bromide in delaying the appearance of. the image is striking. Further, it can be seen that differences in this chart are quite similar to those obtained by exhaustion, showing that a FRESH OLP PE.V. PCV. PIP TESTS FSCSH OLP PCV. PEV. PRINTS FROM FULLY PtVELOPEP STRIPS A. FRE5M PEV. PWNTEP TO GSVE B.EST PICTURE! B . OUP PE.V. " WSTW A C. FRESH PEV. " »» p P. OLP PEV. " TO OWE &E.ST PICTURE. FIG. 3. Exposure loss in exhausted borax developer. large part of the exhaustion effect with borax developer can be attributed to accumulated bromide. In Fig. 3 are shown the two-minute dip tests at 65 °F. for a fresh and a badly exhausted developer as described above. Corresponding to these are prints from two strips both having the same exposure and each developed to a gamma of 0.7, one in the fresh and one in the old developer. The strips were printed from a 0.3 density step tablet and therefore each step had just twice the exposure of the preceding one. It can be seen that one step on the shadow end is missing from the strip developed in the exhausted developer since that strip has to be moved along one step in order to make the densities the same as in the other strip. In other words, the exhausted developer would