DuPont entered the motion picture film stock market in the 1920s, but in order to penetrate Hollywood, the chief market for its film, DuPont needed to create a product that could match that of the undisputed industry leader, Eastman Kodak. This paper discuses how the competition between these companies contributed to the rapid increase in the quality of film stock and to the changing relationship between technological manufacturers and their customers in Hollywood, revealing an expanded system that positions the studios as both consumers of technology and sellers of entertainment.