ʻO ka umu ahi graphite he mea hana ʻenehana hiki ke hana i ka graphite mai nā ʻano pōhaku like ʻole a me nā kinikona.Hiki ke hoʻohana ʻia e hana i nā mea graphite me ke ʻano kiʻekiʻe, ka hana kiʻekiʻe a me ka conductivity uila ikaika.Nui nā ʻano o ka umu graphite, ʻano mokulele maʻamau, kūpaʻa, ʻano hoʻokuʻu, ʻano wai a pēlā aku.