flake-like, partially, detached raising of small thickness, resulting from flaking of the surface layer, which is of a different composition than the parent material, väikese paksusega helbetaoline, osaliselt eraldunud kõrgendik, mis tekib mõõteobjekti pinnakihi kestenduse tagajärjel, mille koostis erineb põhimaterjali koostisest