The first flexible photographic film in 1885 was developed by Eastman Kodak. This original film was coated on paper. In 1889 the first transparent plastic film was produced. Before glass photographic plates were used. The first photographic film was made from highly flammable nitrocellulose with camphor as plasticizers. In the beginning of the 1920's, nitrate film was replaced with cellulose acetate or safety film.
The discovery that the spectral sensitivity of a film could be extended by dye sensation was done by Hermann Wilhelm Vogel. In 1879 it was introduced that orthochromatic film to be sensitive to the spectral range from green to blue. This was very popular until the mid 1920's, when panchromatic film was sensitive to the entire visual spectrum. All these films were used to produce black and white images. In 1861 were the first experiments to be done with color photography.
Leonela
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