TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Nickel Source: The nickel ions are derived from nickel (II) sulfate, nickel (II) chloride, nickel carbonate and/or nickel alloy. Preferably, the nickel ions are nickel-ammonium aquo complexes.Preferred Composition: The conductive layer contains at most100 ppm of titanium. The metal-plated layer is nickel plated layer.Preferred Process: The plastic porous material contained in metallic porous material is removed by heat treatment.    TECHNOLOGY FOCUS - POLYMERS - Preferred Material: The plastic porous material is made of a polyurethane foam. SPECIFIC COMPOUNDS - The reducing agent is a mixture of titanium (III) chloride, titanium (IV) chloride and citric acid.    EXAMPLE - A polyurethane foam with continuous-pore structure having thickness of 1 mm and average pore diameter of 0.45 mm was used as core. The core was rinsed with water at 60degreesC. The plating liquid was prepared by mixing 1 liter each of reducing liquid comprising 100 mM of sodium citrate dihydrate, 100mM of 20% titanium (III) chloride solution, and nickel solution comprising 200 mM of nickel (II) sulfate hexahydrate and 200 mM of sodium citrate dihydrate. pH of plating liquid was controlled to 9 by adding dilute sulfuric acid or 25% ammonia solution. The core was immersed in plating liquid at 50-60degreesC for 30 minutes and a conductive porous material having a conductive layer, was formed. The average particle diameter of nickel particles contained in the conductive layer was 100 nm, as determined by semielectron microscope studies. The conductive porous material was drawn unidirectionally by 10% and subjected to bending test individually. The longitudinal resistance OMEGA was measured across the sample under dry conditions. The electrical resistance of the material after drawing was 120-150 OMEGA and after bending was 100-150 OMEGA. The initial electric resistance of the material was 100-150 OMEGA. The growth rate of nickel-plated layer was found to be the same (25 cm/min) at initial state, after drawing and bending tests.