Iteknoloji
Uluhlu lwekhabhoni esebenzayo lwenziwa ngamalahle akumgangatho ophezulu akhethwe ngokungqongqo kunye namalahle adityanisiweyo. Ukuxuba i-powder yamalahle kunye ne-tar kunye namanzi, i-extrusion yezinto ezixutywe kwi-Columnar phantsi kwengcinezelo yeoli, ilandelwa yi-carbonization, i-activation kunye ne-oxidation.