In cinematography, bipacking, or a bipack, is the process of loading two reels of film into a camera, so that they both pass through the camera gate together. It was used both for in-camera effects (effects that are nowadays mainly achieved via optical printing) and as an early subtractive colour process.[1]
^Read, Paul; Meyer, Mark-Paul (2000). Restoration of Motion Picture Film. Oxford: Elsevier Science. pp. 43, 310. ISBN075062793X. OCLC45352344.