Akwai da yawa hanyoyin da pre-buga surface pretreatment naInjin buga fim ɗin filastik, wanda za a iya raba gabaɗaya zuwa hanyar maganin sinadarai, hanyar maganin harshen wuta, hanyar jiyya na fitar da korona, hanyar jiyya ta ultraviolet, da dai sauransu. Hanyar maganin sinadarai galibi don shigar da ƙungiyoyin polar a saman fim ɗin, ko amfani da reagents na sinadarai don cire abubuwan ƙari a saman fim ɗin don inganta ƙarfin saman fim ɗin.

Ka'idar aiki na hanyar maganin harshen wuta ita ce barin fim ɗin filastik da sauri ya wuce 10-20mm daga harshen wuta na ciki, da kuma amfani da zafin jiki na harshen wuta don tada iska don samar da radicals kyauta, ions, da dai sauransu, da kuma amsawa a saman fim din don samar da sababbin abubuwan da aka gyara da kuma canza fim din. Properties na saman don inganta mannewa zuwa tawada. Ya kamata a buga kayan fim ɗin da aka bi da su da wuri-wuri, in ba haka ba za a wuce sabon wuri da sauri, wanda zai shafi tasirin magani. Maganin harshen wuta yana da wahalar sarrafawa kuma yanzu an maye gurbinsa da maganin sallamar corona.

Ka'idar aiki na jiyya na fitar da korona ita ce wuce fim ɗin ta hanyar wutar lantarki, wanda ke haifar da bugun jini mai saurin motsi wanda ke tilasta iska zuwa ionize. Bayan ionization, ion iskar gas suna kan fim ɗin don ƙara haɓakar sa.

A lokaci guda kuma, atom ɗin oxygen kyauta suna haɗuwa da kwayoyin oxygen don samar da ozone, kuma ana haifar da ƙungiyoyin polar a saman, wanda a ƙarshe yana ƙara tashin hankali na saman fim ɗin filastik, wanda ke da kyau ga manne tawada da adhesives.