Cov tshuaj pleev thaiv hnub thiab cov qauv siv tau yooj yim rau oxidation, ua rau cov xim hloov, sib cais, lossis poob ntawm SPF kev ua tau zoo. Kev ntim khoom yog qhov tseem ceeb rau kev tiv thaiv cov tshuaj pleev ib ce thiab tshuaj tshuaj tiv thaiv ib puag ncig kev ntxhov siab xws li oxygen, noo noo, thiab UV raug. Tsib-txheej txheej txheej txheej txheej txheej muab kev tiv thaiv kev tiv thaiv siab heev, ua rau lawv zoo tagnrho rau cov khoom rhiab zoo li cov tshuaj pleev thaiv hnub, tshuaj pleev qhov ncauj, thiab kev tu tawv nqaij zoo. EVOH (Ethylene Vinyl Cawv) ntxiv cov txheej txheem hauv nruab nrab uas tiv thaiv koj cov mis hauv nws lub txee lub neej.