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Found film is the most common name for the still film or movie footage found exposed but undeveloped; it is also often referred as undeveloped film, or forgotten film. A well known found film was found in 1930 at the shore of arctic island Kvitøya; the film had recoverable images of the last days of S. A. Andrée's Arctic Balloon Expedition of 1897. The most sought not found film is probably the one from a Kodak camera presumably left on Mount Everest by the vanished British expedition of 1924.
Development of old films
Several photo lab services specialize in development of old outdated films. The self-processing by photo enthusiasts is common but not recommended since the latent image is not recoverable most of the time without special procedures such as use of high-contrast active developer at the very low temperatures (as low as 0 °C/32 °F). The two popular standard developers used to process outdated films are Kodak HC-110 and Kodak D-19. The old color film is often processed as black and white since color dyes usually decompose faster than silver-based layer.