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

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STANDARDS ADOPTED by the SOCIETY OF MOTION PICTURE ENGINEERS DIMENSIONAL STANDARDS 1 . Dimensions of Newly Cut and Perforated Film. a. Standard 35 mm. negative film The dimensions for this material are shown in Chart 1. b. Standard 35 mm. positive film The dimensions for this material are shown in Chart 2. It will be noted that two forms of perforation may be used with this material, both forms being recognized as standard by the Society. c. Safety standard 28 mm. positive and negative film The dimensions for these materials are shown in Chart 3. d. Standard 16 mm. positive and negative film The dimensions for these materials are shown in Chart 4. 2. Frame Line. a. Standard 35 mm. film The frame line shall be half way between two successive perforations on each side of the film. b. Safety standard 28 mm. film The center of the frame line shall pass through the center of a perforation on each side of the film. 3. Film Splicing Specifications. Standard dimensional specifications for the making of film splices for laboratories and exchanges are given in Chart 5. 4. Lantern Slide Mat Opening. 3.0 inches (76.20 mm.) wide by 2.25 inches (57.15 mm.) high. 545