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

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56 HARSH AND SCHADLICH July An exhaust system removes fumes from the color developer and bleach-mixing tanks. CONTROL LABORATORY The control laboratory, which is located next to the mixing room, is equipped to carry out the control procedures and chemical analyses described in the papers by Bates and Runyan2 and Brunner, Means, and Zappert.3 Fig. 7 — Photograph from front of review room. PRINTING Standard equipment with slight modification is used for optical and release printing. An Acme optical printer is used for printing masked duplicates and special effects. The basic features of this printer have been described by Dunn.4 A Bell and Howell Model D, modified with an optical system for increased illumination and with a filter-change devise for scene-to-scene correction, is used for printing. SOUND TESTING The equipment for sound testing, which has not yet been installed,