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Definition: film


Film is an analog method for recording still photos and moving images. Following Daguerreotype photography (see image), still image film was invented by George Eastman in 1885, who founded Eastman Kodak Company three years later.

Film is a strip of plastic coated with an emulsion of light-sensitive silver halide crystals. In monochrome film, the crystals absorb the light. In the development process, they become silver and block the light to become the black areas on the negative. Color film has layers of color sensitive dyes starting on top: blue; yellow to prevent blue leakage; green-blue and red-blue. In development, the color dyes are retained and combine to form the colored image. See film camera.




Roundhay Garden Scene (1888)
Not long after Eastman's invention, French inventor Louis Le Prince made a two-second silent "moving picture," considered to be the oldest surviving movie film.






In the Antique Shop
Kodak film, which is still being made, may some day be history. Years ago, signs such as this were everywhere, but this one was for sale in an antique shop.