Appendix D: S E N 2:

Successive exposure negative 2. S E N 2 is a method of motion picture color photography in which two color separation negative images were recorded on one strip of film by photographing each frame two times successively through red and blue filters. The resultant negative was subsequently optically printed by the use of a skip-frame mechanism. The process was restricted to the photography of animated cartoon and puppet subjects in which the movement from frame to frame could be controlled. The successive exposure process was rendered obsolete by the introduction of 3 layer (multilayer) color negative film.