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 #:
000680
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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1949 SPRAY PROCESSING 677 IV. EXPERIMENTAL RESULTS Table II shows the rates of loss of Elon and hydroquinone in grams per hour from each system after the figures have been adjusted to relate to standardized conditions of initial volume and developingagent concentration. The standard volumes are taken as 7.0 and 130 liters and the rates are adjusted (to 2.0 grams Elon, 5.0 grams hydroquinone, arid 1.72 grams Elon, 3.30 grams hydroquinone) on the assumption that they should be proportional to the initial concentration, the pR being constant. TABLE II RATES CORRECTED TO STANDARD VOLUMES AND CONCENTRATIONS Standard Rate of Loss of Volume, Developing Agent Developer System Liters from the System Elon HQ D76d S-R Spray 7.0 1.0 2.2 L-R Spray 130 14.3 34.1 Quiet 130 0 0 Air-trapping 130 2.8 8.8 Air-bubbling 130 4.3 9.8 D76d S-R Spray 7.0 0.8 2.0 +Ag L-R Spray 130 ... ... Quiet 130 0 0 Air-trapping 130 2.8 8.9 Air-bubbling 130 4.1 7.7 Positive S-R Spray 7.0 0.6 13.7 devel L-R Spray 130 1.8 37.2 oper pH 10.0 Positive S-R Spray 7.0 0.6 18.0 devel L-R Spray 130 1.3 62.2 oper Quiet 130 0 0.9 pH 10.5 Air-trapping 130 0 8.5 Air bubbling 130 0 12.3 Positive S-R Spray 7.0 0.5 20.4 devel L-R Spray 130 .... • . • • oper Quiet 130 0 0 pH 10.5 Air-trapping 130 0 12.7 + Ag Air-bubbling 130 0 12.9 Elon Hydroquinone Standard concentrations^ Negative developer 2 . 00 grams 5 . 00 grams \Positive developer 1 . 72 grams 3. 30 grains