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Reversal film created a small positive projectable image rather than the negatives used since the early days of photography; photography now produced 35mm directly viewable small colour slides, rather than large monochrome negatives. The slide images were too small for unaided viewing, and required enlargement by a projector or enlarging viewer.
In 1905 Keystone View Company began its Educational Department, selling views and glass lantern slides (the 4 x 3.25 inch ancestors of the better-known 2 x 2 inch slides containing transparencies on film, which eventually replaced them) to schools throughout the country. They also produced lantern slide projection equipment.
Slide Archive with approximately 10,000 lantern slides, mostly in standard format, used by museum-, educational- and public lectures in Afrikamuseum, Tropenmuseum (in history part of the Royal Tropical Institute)and Museum Volkenkunde. Most slides were produced between 1900 and 1960s.
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In photography, reversal film or slide film is a type of photographic film that produces a positive image on a transparent base. [1] Instead of negatives and prints, reversal film is processed to produce transparencies or diapositives (abbreviated as "diafilm" or "dia" in some languages like German, Romanian or Hungarian).
Examples include; Fortecolor film (also supplied by Konica), the Boots UK pharmacy chain color negative products from ca. 1973 until 2003 and AgfaPhoto color negative and slide films from 2005 until plant closure in 2009 (for Lupus Imaging). Ferrania Technology continues to produce chemicals for medical use and solar panels on part of the ...
It projected slides that were usually painted in color on glass. A sketch by Huygens believed to have been made in 1659, indicates that moving images from mechanical slides may have been part of the earliest screenings. Around 1790, the magic lantern became an important instrument in the multi-media phantasmagoria spectacles. Rear projection ...
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