Mafotokozedwe akuluakulu a graphite petroleum coke ndi awa: chinyezi chochepera 0.5%, sulfure chochepera 0.05%, phosphorous pakati pa 0.04-0.01, nayitrogeni ya hydrogen yochepera 100%ppm. Tinthu tating'onoting'ono ta kaboni tochuluka ndi tapakati, porosity idzakhala yayikulu, liwiro loyamwa limakhala lachangu, ndipo kapangidwe kake ka mankhwala ndi koyera, kuchuluka kwa kuyamwa kudzakhala kwakukulu. Kukula kwa tinthu tating'onoting'ono 0-5mm, 1-5mm, 0-10mm, ndi zina zotero, kumatha kukonzedwa malinga ndi zosowa za makasitomala.
