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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 ...
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).
A positive image is a normal image. A negative image is a total inversion, in which light areas appear dark and vice versa. A negative color image is additionally color-reversed, [6] with red areas appearing cyan, greens appearing magenta, and blues appearing yellow, and vice versa.
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.
135 frame and perforations Half-frame negatives (left and right) with standard 35 mm (centre) The term 135 format usually refers to a 24×36 mm film format , commonly known as 35 mm format. The 24×36 mm format is common to higher-end digital image sensors , where it is typically referred to as full-frame format.
127 color transparencies can be mounted in standard 2” square slide mounts, and projected in an ordinary 35 mm projector. Because of their much greater area, the projected image is larger and more brilliant than a 35 mm slide, and they are popularly called " Superslides ", a name once reserved for 40 × 40 mm slides cut down from 120 film.