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Article

Jeffrey Martin

Medium on which a series of photographic images are recorded on a flexible plastic base in order to produce the illusion of movement when reproduced by projection through a lens or other means. Although ‘film’ has been used by the general public as a catch-all term for any moving image medium, it actually refers specifically to photochemical reproduction.

Three different types of film base have been used in motion picture production. The first, cellulose nitrate, was used from the time it was introduced by Eastman Kodak in 1889, through the early 1950s. Cellulose nitrate was durable, withstood repeated projection, and provided a high-quality image. It was also extremely flammable, requiring careful handling in shipping and storage, and the construction of special fireproof projection booths in theatres. It is always identified by the words ‘Nitrate film’ along one edge. Cellulose acetate film was first made available commercially in 1909, but was inferior in strength to nitrate film, and was not widely adopted for theatrical use. It was, however, used exclusively in smaller-gauge film for home and amateur use by the 1920s. In ...