the following examples a base paper a was produced from eucalyptus pulp for refining the pulp was placed in a roughly 5 aqueous suspension thick matter and ground to a degree of fineness corresponding to 36 u00b0 sr with the aid of a refiner the average fibre length was 0 64 mm the concentration of cellulose fibres in the thin matter was 1 by weight relative to the mass of the cellulose suspension additives were added to the thin matter including cationic starch in a quantity of 0 4 by weight alkyl ketene dimer akd as a neutral sizing agent in a quantity of 0 48 by weight wet strengthening agent polyamine polyamide epichlorhydrin resin kymene u00ae in a quantity of 0 36 by weight and a natural caco 3 in a quantity of 10 by weight the quantities indicated are relative to the cellulose mass the thin matter the ph value of which was adjusted to about 7 5 was transported from the headbox to the screen on the paper machine after which the machine began to form sheets by dewatering the web in the screen area of the paper machine in the compaction area the web was dewatered further to reach a water content of 60 by weight relative to the weight of the web further drying took place in the drying area of the paper machine with heated drying cylinders a base paper having a grammage of 160 g m 2 and moisture.