Nta kanseri iba muri toner, kandi niba uhisemo guhitamo toner yo mu rwego rwo hasi, hazaba harimo ibintu byinshi cyangwa bike byangiza muri byo; Byongeye kandi, tonier yo hasi izagira ingaruka muburyo bwo gukoporora, bikavamo ibara ryinyuma ryamabara kuri kopi nigicucu gitandukanye cyandikishijwe intoki; Icy'ingenzi cyane, tonier yo hasi nayo izatera kwambara no kurira kuri toner cartridge imbere muri kopi, niba fuser roller yumushinga wa kopi ya tonier yandujwe na toner, akenshi bizana umukungugu imbere muri kopi, kandi ivumbi rimaze kugwa. ikibaho cyumuzunguruko cyakazi cya kopi, biroroshye kugira uruziga rugufi, bityo byangiza kopi.
Toner, igice nyamukuru ni karubone, hariho kandi byinshi bigizwe na binders na resin, mugihe kopi igiye kurangira, tonier izashongeshwa mumibabi yimpapuro nubushyuhe bwo hejuru bwa dogere selisiyusi 200, n'ibikoresho bya resin bigize uruganda rwa kopi ya tonier bizahinduka okiside muri gaze ikaze, mubyukuri ni ozone dukunze kuvuga. Toniers zose ntabwo zisa, kandi ntabwo tonier zose zandika kimwe, imiterere ya toner igena ingaruka zo gucapa.