I-inki engapheliyo, enokuthi isetyenziswe ngebrashi, ipeni yokumakisha, isitshizi okanye ngokufaka iminwe yabavoti ebhotileni, iqulethe i-nitrate yesilivere.Ikhono layo lokungcolisa umnwe ixesha elaneleyo - ngokubanzi ngaphezu kweeyure ze-12 - lixhomekeke kakhulu kwi-concentration ye-nitrate yesilivere, isetyenziswe njani kwaye ihlala ixesha elingakanani eluswini kunye ne-fingernail ngaphambi kokuba inkino eninzi isuswe.Umxholo we-nitrate yesilivere unokuba yi-5%, i-7%, i-10%, i-14%, i-15%, i-20%, i-25%.
Usiba lophawu olungenakucimeka lusetyenziswa kumnwe (oqhelekileyo) wabavoti ngexesha lonyulo ukuze kuthintelwe ubuqhophololo kunyulo olufana nokuvota kabini.Yindlela esebenzayo kumazwe apho izazisi zabemi zingahlali zisemgangathweni okanye zibekwe ngokwamaziko.