To begin a bipack matte filming, the live action portion is shot.

Two black-and-white 35 mm film negatives are threaded bipack in the camera.

The technique of bipack color photography became economical in the early 1910s when Kodak introduced duplitized film.

Mr. Crespinel also invented a system called Bipack, which made it possible for any camera to shoot color film.

The bipack process, which is a competing method to optical printing, was used until digital methods of compositing became predominant in the industry.

After shooting tests, including film bipack and bleach bypass techniques, Deakins suggested digital mastering be used.

Over the years, a great number of bipack color processors existed, largely due to the lack of holding patents on processing in this method.

This bipack color system used two strips of film running through the camera, one recording red, and one recording blue-green light.

The "blue" and "red" films were layered emulsion to emulsion as a bipack stock.

In its two-color version, Trucolor films were shot in bipack, with the two strips of film being sensitized to red and green.

Care would be taken to avoid photographing objects of purple, lavender or pink coloring, as bipack color generally cannot reproduce these colors in printing.

Early colour processes such as Prizmacolor, Multicolor, Cinecolor, and Trucolor all used bipack film.

Eastman, Agfa, Gevaert, and DuPont all manufactured bipack film stock for use as a colour process from 1920s onwards.

In cinematography, bipacking, or a bipack, is the process of loading two reels of film into a camera, so that they both pass through the camera gate together.

Panchromatic negative film is used in the camera as the rear component of a bipack in which the front film is a positive yellow dye image of the background scene.

This was done, according to Scorsese, to emulate the look of early bipack color films, in particular the Multicolor process, which Hughes himself owned, emulating the available technology of the era.

In bipack color photography in motion pictures, two strips of film are used to record two colors of the spectrum for the purpose of print later onto one strip of film.

The other beam passed through a magenta filter, which blocked green light, and formed an image on a bipack consisting of two strips of film running through the camera with their emulsion sides pressed together.

In addition, Consolidated Film also owned the Trucolor color system, which was shot as bipack color, but processed with special duplitized stock produced by the Eastman Kodak company that carried a dye-coupler.

Although the range of colors which could be reproduced by only two components was limited, skin tones and most hair and eye colors could be rendered with surprising fidelity, making bipack processes a viable option for color portraiture.

For the Olympics, the Technicolor Corporation devised a bipack colour filming process - dubbed "Technichrome" - whereby hundreds of hours of film documented the events in colour, without having to use expensive and heavy Technicolor cameras.

Green light was recorded through a green filter on panchromatic film, while the other half of the light passed through a magenta filter and was recorded on bipack film stock with two strips running base to base.

Since the image must be focused on the plane of contact of the two negatives used, lenses and focusing screens used in bipack photography would be readjusted to throw the plane of focus .006" behind that of the standard black-and-white plane.