Abstract: Photographic base materials are described which contain on at least one side thereof a coating whose binder component is produced predominantly from unsaturated compounds and which has been hardened by means of energy supplying radiation. Discoloration in connection with wet developing is avoided by including within the coating material, before hardening thereof, at least one unsaturated monomeric, oligomeric or polymeric hydroxyfunctional substance and by maintaining the molal concentration of the hydroxyl groups at a value of at least 2. The coating material as defined in the invention is suited for use as a base for photographic layers which are developed wet, as well as for those which are developed dry.

Abstract: Electrostatic recording material is made by coating a conducting paper support with a lacquer comprising at least one unsaturated organic compound and substantially no inert solvent and hardening the lacquer by exposure to radiation such as an electron beam or ultra-violet to form a dielectric layer. The dielectric layer retains charge well at high humidities.