Popanga zinthu zapanyumba, matabwa amafunikira kupukutidwa ndi kupukutidwa, ndipo malamba a mchenga ophatikizika a aluminiyamu ndi malamba a mchenga a silicon carbide ndi oyenera kusankha.
Ma abrasives a Brown osakanikirana ndi silicon carbide abrasives pamwamba pa lamba wamchenga amagwiritsa ntchito mchenga wosabzalidwa pang'ono, ndikugwiritsa ntchito kuchirikiza kwa nsalu ndi kuchirikiza mapepala molingana ndi mawonekedwe a nkhuni (kachulukidwe, chinyezi, mafuta, ndi brittleness).