Abstract: A product comprising a soft elastic base material and an electroconductive film formed on the base material by applying a coating composition to the base material and fixing the composition by an insolubilizing treatment such as irradiation with light, heating or the like, the composition comprising an aqueous solution of polyvinyl alcohol, a fine powder of electroconductive material dispersed therein and an insolubilizing agent for insolubilizing the polyvinyl alcohol by the insolubilizing treatment. The composition may contain a softener to impart softness to the electroconductive film. The soft elastic base material is made of a spongy foamed material and fixed to the peripheral surface of a base roller.