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We've added Ortho to our list of films that can be emulated in the digital world. This was the film of the 1900's and has a distinctive color palette.

 

Below is a history factoid from

http://www.filmreference.com/encyclopedia/Criticism-Ideology/Film-Stock-BLACK-AND-WHITE-AND-COLOR.html

"Until 1925, Hollywood studios used orthochromatic Eastman Standard Negative stock. Orthochromatic film was only sensitive to the brightest natural light, so large ultraviolet lamps had to be used during shooting. It also registered only blue light, so anything colored red showed up on the film as black. This posed a problem for actors and actresses, whose flesh-toned faces appeared darker than normal on screen. Thus began the practice of using heavy white pancake makeup on the majority of screen personalities. In 1922, Robert Flaherty shot his documentary Nanook of the North on orthochromatic film stock, which beautifully accentuated the harsh, colorless landscape.

In 1922, panchromatic film, which was sensitive to all colors, became available for black-and-white filmmaking. The hard-edged blue orthochromatic gave way to the softer gradations of "pan," providing much more natural-looking visuals. But the film industry was hesitant to switch formats, believing orthochromatic was "good enough" to suit its purposes. In 1926, Flaherty shot Moana, a documentary containing lush, tropical scenery, using panchromatic film. It convinced Hollywood to make the change, and by 1930, orthochromatic film manufacturing had been discontinued."

 

Ortho film was used during World War 1 to photograph all the planes and weapons of war. People who want to document their model recreations of classic aircraft and reproduce that peculiar Blue feeling have to use this filter.

Ortho is still in production and is used for copying and for the medical professions.