Is Redevelopment of Optical Soundtracks on Gevacolor Print Film T 9.85 Still Required

Abstract

After a brief historical survey, the problems connected with the quality of optical dye soundtrack on Gevacolor Print Film 9.85 are studied. It may be concluded that the use of T 9.85 permits the omission of the hazardous technique of redevelopment without influencing the frequency or the cross-modulation characteristics of the soundtrack. Due to the specially selected bathochrome cyan dye of Gevacolor Print Film T 9.85, only a slight loss in amplitude is noted, when a conventional S1-equipped soundhead is used.