Ibisobanuro by'ingenzi bya graphite petroleum coke ni ibi bikurikira: ubushuhe buri munsi ya 0.5%, sulfur iri munsi ya 0.05%, fosifore iri hagati ya 0.04-0.01, azote ya hydrogène iri munsi ya 100%ppm. Ubunini bwa karuboni nyinshi mu bunini bw'uduce ni buringaniye, porosity izaba nini, umuvuduko wo kwinjiza ni wihuta, kandi imiterere yabyo ni myiza, igipimo cyo kwinjiza kizaba kinini. Ingano y'uduce 0-5mm, 1-5mm, 0-10mm, nibindi, ishobora gutunganywa hakurikijwe ibyo abakiriya bakeneye.
