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Reversal film is produced in various sizes, from 35 mm to roll film to 8×10 inch sheet film. A slide is a specially mounted individual transparency intended for projection onto a screen using a slide projector. This allows the photograph to be viewed by a large audience at once.
The first flexible photographic roll film was sold by George Eastman in 1885, [45] but this original "film" was actually a coating on a paper base. As part of the processing, the image-bearing layer was stripped from the paper and attached to a sheet of hardened clear gelatin. The first transparent plastic roll film followed in 1889. [46]
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Film is then dried in a dust-free environment, cut and placed into protective sleeves. Once the film is processed, it is then referred to as a negative. The negative may now be printed; the negative is placed in an enlarger and projected onto a sheet of photographic paper. Many different techniques can be used during the enlargement process.
Goodwin living quarters at the Plume House rectory of House of Prayer Church, now listed on the National Register of Historic Places. Hannibal Williston Goodwin (April 30, 1822 – December 31, 1900), patented a method for making transparent, flexible roll film out of nitrocellulose film base, which was used in Thomas Edison's Kinetoscope, an early machine for viewing motion pictures.
An example of slide film requiring development using the E-6 process. The E-6 process (often abbreviated to E-6) is a chromogenic photographic process for developing Ektachrome, Fujichrome and other color reversal (also called slide or transparency) photographic film.
roll film 1932 1995 Similar to 120 film but on a thinner spool 828: roll film 1935 1985 28 × 40 mm 8 35 mm, one perforation per frame Bantam: 35 roll film 1916 1933 1 + 1 ⁄ 4 × 1 + 3 ⁄ 4 in 35 mm stock, unperforated 00 UniveX roll film 1933 1 + 1 ⁄ 2 × 1 + 1 ⁄ 8 in 6 made by Gevaert: Hit (for example TONE camera) roll film 1937 Unknown
Various brands of sealed 120 negative and transparency roll films. The most popular roll film format is 120 film, which is used in most medium format cameras and roll film magazines for large-format cameras. Until the 1950s, 120 roll film was, with the smaller 127 film, also used in the simplest of box cameras and other snapshot cameras.