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 #:
000521
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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504 J. I. CRABTREE AND H. D. RUSSEU, [J. S. M. p. E. haustion with 750 feet of motion picture positive film per gallon. A slight decrease in the hardening properties was obtained with the samples one week old which were taken before revival after processing 450 feet of film. The hardening properties of the 3 per cent chrome alum bath decreased more rapidly on exhaustion with D-76 at 70°F. (Fig. 11) than those of the 3 per cent bath exhausted with D-16 at 70°F. The hardening properties were maintained until 300 feet of film £*" S'70 2/3* Sso 3.0 3% CHROME ALUM D-lfe 70* P. O MELTING • RETICULATION R-REVIVAL FRESH epH X 130 « 90 I Yf££K 4.0 FEET f>CK G*l.t.t I WEEK 100 200 500 400 500 6OO 70O 800 FIG. 10. Effect of exhaustion with acid revival on the hardening properties of a plain 3 per cent chrome alum stop bath (D-16 developer, 70 °F.). per gallon had been processed by reviving with acid every 100 feet, but on further exhaustion the hardening action decreased rapidly and the baths could not be satisfactorily revived by the addition of acid. With D-16 at 85°F., the hardening properties of the 2 per cent bath during exhaustion with revival were more uniform than when the bath was exhausted at 70°F. (Fig. 12). A maximum degree of hardening was maintained until 600 feet of film per gallon had been treated. The film processed in the samples one week old taken after the second revival reticulated at a temperature of 90°F., indicating that too much acid had been added during revival.