Preparation of reprographic sheets

A process for preparing a reprographic sheet suitable for electrostatographic reproduction comprising (a) providing an electrically relatively conducting substrate, (b) applying to said electrically relatively conducting substrate a composition comprising a film forming material of an electrically relatively non-conducting polymer and an organic liquid mixture comprising at least one solvent for said film forming material and at least one non-solvent for said film forming material, said non-solvent being miscible with and having a lower volatility than that of the other liquids in said mixture, said non-solvent being present in an amount less than that which causes precipitation of the film forming material from the organic liquid mixture, the volume of non-solvent to the volume of non-solvent plus volume of polymer being from 0.35 to 0.65, and (c) removing said organic liquid mixture from said composition applied to said substrate such that substantially all of said solvent for said film forming material is removed before any significant portion of said non-solvent is removed, thereby forming a sheet of said substrate carrying said film forming material, said sheet being a reprographic sheet which possesses the necessary electrical characteristics for use in electrostatographic reproduction.