（1） Te horoi whakarewa pararopi

Ko te nuinga o te whakamahi i nga whakarewa pararopi ki te whakakore i te hinu saponified me te hinu kore ki te tango stains hinu.Ko nga whakarewa waro e whakamahia nuitia ana ko te warowaiha, te hinu horoi, te toluene, te tetrachloride waro, te trichloroethylene, me etahi atu.Me tohu ko muri i te tango hinu ma te whakarewa pararopi, me mahi ano te tango hinu taapiri.A, no te pähekeheke te whakarewa i runga i te mata o tengongo tapawhā, i te nuinga o te waa he kiriata angiangi e toe ana, ka taea te tango i nga mahi e whai ake nei penei i te horoi alkali me te tango hinu hiko.

（2） Te horoi matū hiko

Ko te tango hinu Cathode, te whakamahi rereke ranei o te anode me te cathode he mea nui ake te whakamahi.Ko te hau hauwai i wehea mai i te cathode, te hau hāora ranei i wehea mai i te anode e te tauhohenga hiko matū ka whakakorikoria e te otinga i runga i te mata o tengongo tapawhāki te whakatairanga i te poke hinu ki te mawhiti i te mata whakarewa.I te wa ano, ka whakawhiti tonu te otinga, he pai ki te tauhohenga saponification me te emulsification o te hinu.Ko te toenga o te hinu ka wehea mai i te mata whakarewa i raro i te awe o nga mirumiru wehe tonu.Heoi, i roto i te tukanga o te whakakore i te cathodic, he maha nga wa ka uru te hauwai ki roto i te whakarewa, ka pakaru te hauwai.Hei aukati i te hauwai, ka whakamahia te cathode me te anode ki te tango hinu.

（3） Te horoi kawakore

He tikanga horoi i runga i te mahi matū o te kawakore e whakamahia nuitia ana na te ngawari o te whakamahinga, te iti o te utu me te waatea o nga rawa mata.Mai tei te tukanga horoi alkali i runga i saponification, emulsification me ētahi atu mahi, e kore e taea te whakamahi i te alkali kotahi ki te whakatutuki i te mahi i runga ake.He maha nga momo waahanga ka whakamahia, ka taapirihia etahi taapiri penei i te surfactant i etahi wa.Ko te alkalinity e whakatau ana i te tohu o te tauhohenga saponification, me te kawakoretanga teitei ka whakaiti i te awangawanga o te mata i waenga i te hinu me te otinga, ka ngawari te hinu ki te whakaemulsify.I tua atu, ko te kai horoi e toe ana i runga i te mata o tetapawhā tapawhā wāhanga kōhatuka taea te tango ma te horoi wai i muri i te horoinga alkali.

（4） Te horoi o te hau

He tikanga tango hinu e whakamahia nuitia ana ma te whakamahi i nga ahuatanga o te surfactant penei i te iti o te awangawanga o te mata, te makuku pai me te kaha whakaemulsifying kaha.Na roto i te emulsification o te surfactant, e hamanihia te hoê tapo‘i mata tapo‘i mata e te tahi puai i nia i te afata hinu-pape no te taui i te huru o te atanga, kia marara ai nga matūriki hinu i roto i te wairewa wai hei hanga i te emulsion.Na roto ranei i te mahi memeha o te surfactant, te poke hinu e kore e rewa i roto i te wai i runga i tengongo tapawhāka rewa i roto i te micelle surfactant, kia taea ai te whakawhiti i te paru hinu ki te wairewa wai.