Toner ng'oma ndi gawo lofunikira la chosindikizira, mu chosindikizira cha laser, zoposa 70% ya magawo ojambulira amakhazikika mu ng'oma ya tona, kusindikiza kwapamwamba kumatsimikiziridwa makamaka ndi ng'oma ya tona.Cartridge ya toner sikuti imangotsimikizira mtundu wa kusindikiza, komanso imatsimikizira ndalama zomwe wogwiritsa ntchitoyo azigwiritsa ntchito.