1. A reproduction method in which image formation depends on electrical rather than chemical changes induced by light.
2. A non-chemical, non-impact imaging process in which a light source, corresponding to the image to be formed, discharges a charged dielectric photoconductive surface to form an inactive image.

This surface, a photoconductor, containing the unseen image is then dusted with dielectric toner powder which sticks to the charged areas, producing a visible image.