The invention relates to a liquid-permeable primary dressing in the form of a supple thermoplastic section of material (1.4), comprising: a first smooth surface (4) a second surface (5) facing away from the smooth surface (4) and a plurality of three-dimensional perforations, whose walls extend from the first smooth surface (4) and end in an overhang with a free edge, thus making the second surface (5) rough to the touch. At least one of the free edges has an angled section that is approximately perpendicular to a perforation axis. In a preferred embodiment, the periphery (13) of the material section is smooth on both sides, i.e. on both the first and second surfaces (4 5), the periphery (13) of the surface (5) that was at first rough being thermally smoothed.
