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

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AMERICAN MOTION PICTURE STANDARDS AND RECOMMENDED PRACTICES FOREWORD The following American Standards and Recommended Practices (Z22.2 to Z22.35) comprise the entire body of motion picture projects approved by the American Standards Association, and in force at the present date. Z22.34 and Z22.35 were approved September 20, 1930; all the others listed below were approved January 10, 1941, either as revisions of previous specifications or as entirely new standards or recommended practices. In some instances the revisions consist only in changes of Z-numbers. The present publication supersedes all previous publications of American Motion Picture Standards and Recommended Practices. AMERICAN STANDARDS Z22 . 2 35-Mm Sound Film ; Emulsion and Sound Record Position in Camera — Negative Z22.3 35-Mm Sound Film; Emulsion and Sound Record Positions in Projector— Positive. For Direct Front Projection. Z22.4 35-Mm Film; Projection Reels Z22.5 16-Mm Silent Film; Cutting and Perforating Negative and Positive Raw Stock Z22.6 16-Mm Film; Projector Sprockets Z22.7 16-Mm Silent Film; Camera Aperture Z22.8 16-Mm Silent Film; Projector Aperture Z22.9 16-Mm Silent Film; Emulsion Position in Camera — Negative Z22.10 16-Mm Silent Film; Emulsion Position in Projector — Positive. For Direct Front Projection Z22.ll 16-Mm Film; Projection Reels Z22.12 16-Mm Sound Film; Cutting and Perforating Negative and Positive Raw Stock Z22.13 16-Mm Sound Film; Camera Aperture Z22. 14 16-Mm Sound Film; Projector Aperture Z22 . 15 16-Mm Sound Film ; Emulsion and Sound Record Positions in Camera — Negative Z22.16 16-Mm Sound Film; Emulsion and Sound Record Positions in Projector— Positive Z22.17 8-Mm Film; Cutting and Perforating Negative and Positive Raw Stock 217