A ƙarƙashin yanayi na musamman, sutura da fenti kamar fenti na waje, fenti, fenti mota, zai hanzarta aiwatar da tsufa, bayan ɗaukar dogon lokaci zuwa hasken ultraviolet, tsufa mai haske, iskar oxygen.
Hanya mafi inganci don haɓaka matakin juriya na abin rufe fuska shine ƙara antioxidant da stabilizer mai haske, wanda zai iya hana haɓakar radicals free oxidation a cikin resin filastik, bazuwar hydrogen peroxide, da kama radicals kyauta, don samar da kariya ta dindindin ga resin filastik, kuma yana jinkirta jinkirin asarar mai sheki, yellowing da pulverization of shafi.