Educational and instructional film

37.06 - Cinematogra~hicf h ,e osed and developed, whether or not incorporating sound track or cons~stingonly o sound track ?' 3706.10 3706.90 - Of a width of 35 mm or more - Other This headin covers developed standard or substandard width cinematogra hic film for the ro ection o motion pictures, negative or ositive, containing related visua images only, or Eolh related visual images and sound track Pwhether photographically or non-photographically, e.g., magnetically, recorded). t' rPhic This heading also covers developed standard or substandard width cinemato "lmy whether negative or positive, containing no visual images, but consisting solely o one or more sound tracks. The track on film containing only a single sound track must be photoelectricall recorded. Film containing more than one sound track may include magnetically recorded trac but at least one track must be photoelectrically recorded. The photoelectrically recorded tracks appear as narrow printed bands which reproduce the sound vibrations. Sound track film produced solely by processes other than photoelectric (e.g., by mechanical engraving or magnetic recording) is excluded (heading 85.23).