Amakuru ku musaruro GPC ikozwe muri peteroli ya calcium nk'ibikoresho fatizo, hanyuma ikanyura mu buryo bwuzuye mu gupima graphitization ihoraho mu gihe cy'ubushyuhe buri hejuru ya 2800°C. Nyuma, binyuze mu gusya, gusuzuma no gushyira mu byiciro, duha abakoresha bacu ingano itandukanye y'uduce turi hagati ya 0-50mm uko abakiriya babisabye.