Lost Emulsion explores the fascinating world of lost silent film cinema, profiling films that have vanished over time and the efforts to rediscover, preserve, and celebrate them. Through interviews with film historians, archivists, and collectors, filmmaker Glenn Andreiev delves into the cultural and historical significance of these missing works, examining how and why films disappear, what's lost when they do, and the passion that drives modern attempts to recover fragments of early cinema. It is a meditation on memory, decay, and the fragility of the cinematic medium, offering viewers both rare archival glimpses and thoughtful commentary on film history. Like it's companion documentary Found Emulsion, the film is more than a history lesson, serving as a love letter to forgotten cinema and the people determined to save it. Lost Emulsion's legacy lies in spotlighting film preservation as an urgent, ongoing mission, resonating strongly with cinephiles, archivists, and anyone fascinated by the fragile nature of film as both art and artifact.