A support material for recording layers comprising a raw base paper contains a hardwood pulp having a fiber fraction smaller than 200 μm, after refining, of at most 45 wt. % and an average fiber length of 0.4 to 0.8 mm and a filler fraction of 5 to 40 wt. %, in particular 10 to 25 wt. %, relative to the mass of the pulp.