Latest Developments in Variable-Area Processing
Arthur C. Blaney, G. M. Best · Journal of the Society of Motion Picture Engineers · 1939
The purpose of this paper is to present o series of curves showing: the photographic control of variable-area sound-tracks in commercial production at Warner Bros. Studio, and to show the wide tolerances in film processing permissible with Class A push-pull recording, a factor that is of especial interest in daily production. — The results of a study of the technic involved in fine-groin photographic duplicating of variable-area sound-track, for foreign release are also discussed.