Kunezindlela eziningi zokuphrinta kwangaphambi kokuphrinta kwendawoumshini wokunyathelisa ifilimu wepulasitiki, okungahle kuhlukaniswe ngendlela yokwelapha ngamakhemikhali, indlela yokwelapha ilangabi, indlela yokwelapha yokukhishwa kwe-corona, indlela yokwelapha ngemisebe ye-ultraviolet, njll. Indlela yokwelapha ngamakhemikhali ngokuyinhloko iwukwethula amaqembu amhlophe ebusweni befilimu, noma ukusebenzisa ama-reagents amakhemikhali ukususa. izithasiselo phezu kwefilimu ukuthuthukisa amandla angaphezulu efilimu.

Umgomo wokusebenza wendlela yokwelapha ilangabi ukuvumela ifilimu yepulasitiki ukuthi idlule ngokushesha ku-10-20mm kude nelangabi elingaphakathi, futhi usebenzise izinga lokushisa elingaphakathi lelangabi ukuze uvuse umoya ukuze ukhiqize ama-radicals mahhala, ama-ion, njll., futhi asabele ubuso befilimu ukuze bakhe izingxenye zomhlaba ezintsha futhi bashintshe ifilimu. izakhiwo ezingaphezulu ukuze kuthuthukiswe ukunamathela kuyinki. Izinto zefilimu eziphathwayo kufanele ziphrintwe ngokushesha ngangokunokwenzeka, ngaphandle kwalokho indawo entsha izodlula ngokushesha, okuzothinta umphumela wokwelapha. Ukwelashwa kwelangabi kunzima ukukulawula futhi manje sekuthathelwe indawo ukwelashwa kokukhishwa kwe-corona.

Umgomo wokusebenza wokwelashwa kokukhishwa kwe-corona uwukudlulisa ifilimu endaweni kagesi, ekhiqiza ama-pulses anyakazayo anamandla aphoqa umoya ukuba wenze ionini. Ngemuva kwe-ionization, ama-ion egesi acindezela ifilimu ukuze akhulise ukuqina kwayo.

Ngasikhathi sinye, ama-athomu e-oksijini amahhala ahlangana nama-molecule e-oxygen ukuze akhiqize i-ozone, futhi amaqembu e-polar akhiqizwa phezulu, okugcina kwandisa ukungezwani okungaphezulu kwefilimu yepulasitiki, evumela ukunamathela koyinki nokunamathela.