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Film, Darkroom & Historic Processes

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C-41 Process Film, Darkroom & Historic Processes minutes at °C The standardised chemical process for developing colour negative film. 3′15″ at 38 °C Calotype Film, Darkroom & Historic Processes An early paper-negative process, patented by Fox Talbot in 1841, allowing multiple prints from one exposure. Camera Obscura Film, Darkroom & Historic Processes A darkened room or box in which a small aperture projects an inverted image of the outside world onto an inner surface. Characteristic Curve Film, Darkroom & Historic Processes density vs log exposure A graph plotting a film's resulting density against the logarithm of the exposure it received. D vs log H Chromogenic Black and White Film Film, Darkroom & Historic Processes ISO A monochrome film that forms its image from dye couplers rather than silver, and is processed in standard colour chemistry. Colour Negative Film Film, Darkroom & Historic Processes ISO Film that records a colour image with tones and colours inverted, printed or scanned to produce a positive. Colour Reversal Film Film, Darkroom & Historic Processes ISO Film that produces a positive transparency directly, viewable and projectable without printing. Contact Print Film, Darkroom & Historic Processes A print made with the negative in direct contact with the paper, producing an image the same size as the negative. Magnification = 1:1 Contact Sheet Film, Darkroom & Historic Processes A print made by laying an entire strip or roll of negatives directly on paper, showing every frame at negative size. Contrast Index Film, Darkroom & Historic Processes CI A measure of the average slope of a film's characteristic curve over the range actually used in practice. Cross-processing Film, Darkroom & Historic Processes Deliberately developing film in chemistry intended for a different process, producing extreme colour and contrast shifts. Cyanotype Film, Darkroom & Historic Processes An iron-based printing process producing images in Prussian blue, developed simply by washing in water.