Electrostatic transfer of magnetically held toner images

A process comprising spatially periodically magnetizing a layer of acicular chromium dioxide particles in a binder which particles comprise from 40 to 85 weight percent of a layer from 0.001 to 0.015 mm thick which layer has a resistivity of less than about 1.times.10.sup.+9 ohm-cm adhered to a grounded electrically conductive layer, bringing said layer of acicular chromium dioxide into superposed position with a document containing thereon indicia which are to be copied, uniformly illuminating said document so that radiant energy is transmitted through said document in the areas of said document not covered by indicia whereby the acicular chromium dioxide in the areas where it is illuminated is heated to above its Curie point and demagnetized while the areas of acicular chromium dioxide covered by the indicia contained on said document are not heated above their Curie point, applying uncharged toner particles which have a low electrical conductivity of less than about 1.times.10.sup.-13 mho/cm and which comprise ferromagnetic material and a fixable material uniformly to the chromium dioxide layer whereby said toner particles adhere only to the magnetized areas of the chromium dioxide, maintaining said toner particles in the uncharged condition, superposing a dielectric substrate capable of maintaining an electrostatic charge in intimate contact with said acicular chromium dioxide layer, and applying an electric field while said substrate is positioned adjacent said layer of acicular chromium dioxide whereby said toner particles adhere to said substrate upon separation of said substrate from said layer of chromium dioxide.