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Two frames of a vertical filmstrip take up roughly the same amount of space as a single frame on the horizontal. Including its guard band, a vertical filmstrip could contain up to 64 images, while a horizontal oriented strip usually contained 32 images. This is based on the equivalent of a 25 exposure length of 35mm still camera film.
The film strips, or film cards, were fed through a slide viewer similar to a View-Master, which was art deco or streamlined in style. The viewers were made of bakelite and available in multiple colors. When held up to light the images appeared in 3D. The films were based on attractive scenery, children's stories, travel, night life, and current ...
In bipack color photography for motion pictures, two strips of black-and-white 35 mm film, running through the camera emulsion to emulsion, are used to record two regions of the color spectrum, for the purpose of ultimately printing the images, in complementary colors, superimposed on one strip of film.
Alas, certain early color TV transfers were exposed without respect to whether the film was wound conventionally on the reel (A-wind, i.e. emulsion facing toward the hub) or whether the wind was reversed (B-wind) rendering the resulting color image as somewhat faulty, i.e. due to the thickness of the film itself, one primary color was out-of-focus.
During development, the exposed silver salts are converted to metallic silver, just as with black-and-white film. But in a color film, the by-products of the development reaction simultaneously combine with chemicals known as color couplers that are included either in the film itself or in the developer solution to form colored dyes.
AD strips are dye-coated paper strips that can detect and measure the severity of vinegar syndrome in film collections. The strips change color, shifting from a blue to green to level, based on the level of acidity found. If the AD strip level remains at blue, the film is in good condition and no deterioration is present.
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Trucolor films were shot in bipack, with the two strips of film being sensitized to red and blue. Both negatives were processed on duplitized film, much like Trucolor's rival process Cinecolor. Unlike Cinecolor, however, the film was not dyed with a toner but a color coupler, similar to Eastmancolor film. Because of this chemical composition ...