Radiographs are generated in an apparatus comprising a fine mesh screen coated with an X-ray sensitive photoconductor by exposing said screen to an X-ray image while said coated screen is in physical contact with an insulating charge-supporting member and while an electrical potential is applied between the screen and an electrically conducting plate located on the side of the insulating member which is opposite the side the coated screen is on, and thereafter electrostatically toning the latent image formed on the charge-supporting member as a consequence of the X-ray exposure.
A xeroradiographic plate or foil has a non-conducting selenium layer. The X-ray absorption of the selenium layer is improved by additions of elements of high atomic number or chemical compounds of such elements especially lead, thallium and elements of the rare earth group. In a preferred example, the selenium consists of three layers, one layer of pure selenium, a second layer with additions of high atomic number elements and a third layer with an addition of arsenic.
