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electrostatic process

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(also electrostatography), n. ~ A technique for making reproductions, often called photocopies, by using charged pigments to create an image of the original on paper or film.

Notes: 

The electrostatic process uses the photoelectric properties of certain metals. An image of the original is projected onto a light-sensitive substance, creating a charge relative to the light and dark portions of the original. The charge on the surface attracts or repels toner, a charged pigment, that duplicates the original. In a direct positive, the image is formed directly on paper or film. In an indirect process, the image is formed on a metallic drum that is then transferred to paper or film.

Sometimes called xerography, derived from the tradename Xerox.