a density of 0 910 to 0 930 g cm 3 and a melt flow index of 1 to 20 g 10 min with respect to the polymer layer in a further preferred embodiment of the invention the back face of the base paper is coated with a polyolefin in particular polyethylene particularly preferably a polyethylene blend of ldpe and hdpe is used wherein the ld hd proportion is 9 1 to 1 9 in particular 3 7 to 7 3 furthermore the polymer layers may contain white pigments such as titanium dioxide as well as other auxiliary substances such as optical brighteners colorants and dispersing additives the coat weight of the polymer layers on the front face and back face may each be 5 to 50 g m 2 preferably 20 to 50 g m 2 or particularly preferably 30 to 50 g m 2 in a further embodiment of the invention further layers such as protective layers or gloss improving layers may be deposited on the outer microporous layer provided for printing with conductive particles using the inkjet printing process the coat weight of such layers is preferably less than 1 g m 2 eucalyptus cellular material was used to manufacture the base paper for beating the cellular material was beaten as an approximately 5 aqueous suspension thick matter using a refiner to a degree of beating of 36 u00b0 sr the mean fibre length was 0 64 mm the concentration of cellular material fibres in the thin matter was 1 by weight with respect to the mass of the cellular material suspension the thin matter was supplemented with additional substances such as a neutral sizing agent alkyl ketene dimer akd in an amount.