Ipleyiti grafayithi (isikhephe grafayithi) isebenzisa izinto grafayithi ezikumgangatho ophezulu, esongeza eziphilayo kunye nokumelana asidi olomeleleyo. Icokiswa ngoxinzelelo oluphezulu, ukumitha, kunye nonyango olushushu lobushushu. Inokumelana okumangalisayo kweasidi kunye nobushushu. Yinto efanelekileyo yokufakelwa kwetanki ye-phosphoric acid kunye neetanki zokugcina i-phosphoric acid kwimizi-mveliso yamachiza. Imveliso ineempawu zokuxhathisa ukunxiba, ukumelana neqondo lobushushu, ukuxhathisa uxinzelelo, ukumelana nomhlwa, ukunganyangeki kweoyile, ioyile engenazithambisi, umlinganiso omncinci wokwandisa, kunye nokusebenza ngokutywina okungaphezulu.