Photographic film

This article is mainly concerned with still photography film. For motion picture film, please see film stock. Photographic film is a sheet of plastic (polyester, nitrocellulose or cellulose acetate) coated with an emulsion containing light-sensitive silver halide salts (bonded by gelatin) with variable crystal sizes that determine the sensitivity, contrast and resolution of the film. When the emulsion is sufficiently exposed to light (or other forms of electromagnetic radiation such as X-rays), it forms a latent (invisible) image. Chemical processes can then be applied to the film to create a visible image, in a process called film developing.
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Noun
1. photographic material consisting of a base of celluloid covered with a photographic emulsion; used to make negatives or transparencies
(synonym) film
(hypernym) photographic paper, photographic material
(hyponym) footage

PELLICOLA FOTOGRAFICA

B: (Fisika) film (fotografik)
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