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This a very special gear, the Polaroid AutoProcessor 35mm. It allows to process 35mm Polaroid film yourself without the help of a lab within a few minutes. The main use was to make slides for presentations, but b&w lithographic film to present documents was also available. This film was an attempt to use the Polavison technology. Polavision was an instant motion picture film, introduced in 1973, which failed commercially because of the upcoming video systems.

Some information from Wikipedia:

"Polachrome was an easy to develop 35 mm film, available in color, monochrome and 'blue' formats (the latter intended for making title cards). Each roll of film came with a cartridge containing developing chemicals which were pressed between the film and a developing strip by a hand-cranked machine called the AutoProcessor. The AutoProcessor was very cheap and did not require a darkroom; the results were somewhat variable, the resolution was not as good as conventional film due to the matrix of tiny red, green and blue filters required to make the monochrome emulsion work in color, and the sensitivity was low, even for slide film; in tungsten light, Polachrome CS is rated at ISO 40. It was introduced in 1983.

Additive film (such as Polavision and Polachrome slide film) uses a color mask of microscopically thin transparent red, green, and blue lines (3000 lines per inch) and a black and white emulsion layer to reproduce color images in transparency film. The resulting dye developers (unexposed emulsion) block the colors not needed and project the color or combination of colors which form in the resulting image. Since the lines are so close to each other, the human eye easily blended the primary colors together to form the correct color, much like an LCD display or television. For instance, a photo of a yellow flower would expose the emulsion beneath the red and green masks and not the blue mask. The developing process removed the exposed emulsion (under the red and green masks) and diffused the unexposed dye developer (under the blue mask) to its receiving layer, blocking light from coming through. This resulted in the projected light shining through the red and green masks but not the blue mask, creating the color yellow. Because of the film density, film speeds were necessarily slow. High precision was required for the production of this film."

Some pictures:

A black box.

Easy instructions on the box.

Box open.

More instructions.