Puas yog Titanium Dioxide Sunscreen Ua Teeb Meem?
Nrog rau lub caij ntuj sov tuaj txog, tshuaj pleev thaiv hnub tau dhau los ua ib qho yuav tsum muaj hauv ntau tus neeg lub neej txhua hnub. Ntawm ntau cov khoom xyaw tshuaj pleev thaiv hnub, titanium dioxide tau nyiam ntau xim vim nws cov tshuaj pleev thaiv hnub zoo tshaj. Txawm li cas los xij, ntau tus neeg kuj muaj lus nug hauv lawv lub siab: Puas yog titanium dioxide tshuaj pleev thaiv hnub muaj teeb meem? Kab lus no yuav tshawb txog qhov teeb meem no kom ntxaws los ntawm ntau lub ces kaum los pab txhua tus neeg kom nkag siab zoo txog kev nyab xeeb thiab kev ceev faj ntawm titanium dioxide tshuaj pleev thaiv hnub.
I. titanium dioxide yog dab tsi?
Titanium dioxide (TiO2) yog ib qho ntxhia tshwm sim uas feem ntau siv hauv tshuaj pleev ib ce, khoom noj khoom haus thiab tshuaj. Hauv tshuaj pleev thaiv hnub, titanium dioxide, raws li lub hnub ci lub cev, tuaj yeem cuam tshuam thiab tawg ultraviolet (UV) lub teeb, yog li tiv thaiv cov tawv nqaij los ntawm tshav ntuj thiab kev yees duab.
II. Kev nyab xeeb ntawm titanium dioxide tshuaj pleev thaiv hnub
1. Daim ntawv pov thawj los ntawm cov koom haum tso cai
Ua ntej tshaj plaws, nws tsim nyog hais tias titanium dioxide tau lees paub tias yog cov khoom siv tshuaj pleev thaiv hnub muaj kev nyab xeeb thiab zoo los ntawm cov koom haum muaj cai xws li US Food and Drug Administration (FDA) thiab European Cosmetics Regulation. Los ntawm kev soj ntsuam nruj thiab kev tshawb fawb, cov koom haum no tau lees paub tias titanium dioxide tsis muaj kev phom sij rau tib neeg lub cev nyob rau hauv qhov kev qhia tshwj xeeb.
2. Cov nyhuv ntawm particle loj
Qhov loj me me ntawm titanium dioxide yog qhov tseem ceeb cuam tshuam rau nws txoj kev nyab xeeb. Cov tsoos titanium dioxide hais yog loj thiab tsis tuaj yeem nqus tau los ntawm daim tawv nqaij. Lawv tsuas nyob rau ntawm daim tawv nqaij thiab ua raws li lub cev tiv thaiv. Txawm li cas los xij, nrog kev txhim kho ntawm nanotechnology, nano-theem titanium dioxide hais tau pib siv rau hauv cov tshuaj pleev thaiv hnub. Muaj qee qhov kev tsis sib haum xeeb hauv zej zog kev tshawb fawb txog seb nano titanium dioxide puas yuav nqus los ntawm daim tawv nqaij thiab nkag mus rau tib neeg lub cev. Feem ntau cov kev tshawb fawb tam sim no qhia tau hais tias cov nano titanium dioxide feem ntau nyob rau saum npoo ntawm daim tawv nqaij, nrog rau qhov tsis tshua muaj peev xwm nkag mus rau ntawm daim tawv nqaij, thiab ua rau muaj kev pheej hmoo me ntsis rau tib neeg kev noj qab haus huv.
III. Kev ceev faj rau kev siv titanium dioxide tshuaj pleev thaiv hnub
1. Txoj kev siv kom raug
Txhawm rau kom ua tau zoo thiab kev nyab xeeb ntawm titanium dioxide tshuaj pleev thaiv hnub, txoj kev siv kom raug yog qhov tseem ceeb heev. Ua ntej siv, nws raug nquahu kom siv tshuaj pleev thaiv hnub sib npaug ntawm cov tawv nqaij huv thiab qhuav, thiab nws yuav tsum tau siv 15-30 feeb ua ntej tawm mus kom cov khoom xyaw tshuaj pleev thaiv hnub tuaj yeem ua lub luag haujlwm tag nrho. Tsis tas li ntawd, tom qab kev ua si sab nraum zoov mus ntev lossis ua luam dej lossis tawm hws, nws yog ib qho tsim nyog yuav tsum rov qab siv tshuaj pleev thaiv hnub rau lub sijhawm kom muaj kev tiv thaiv tsis tu ncua.
2. Kev ceev faj rau cov tawv nqaij rhiab heev
Rau cov neeg uas muaj cov tawv nqaij rhiab heev, nws yog ib qho tseem ceeb tshwj xeeb yog xaiv cov tshuaj pleev thaiv hnub me me thiab tsis khaus. Muaj qee cov tshuaj pleev thaiv hnub titanium dioxide tsim rau cov tawv nqaij rhiab heev ntawm lub khw, uas feem ntau muaj cov khoom xyaw soothing xws li aloe vera thiab glycyrrhizic acid kom txo tau cov tawv nqaij khaus. Yog tias koj muaj kev tsis xis nyob xws li tawv nqaij liab, o, khaus, thiab lwm yam thaum siv, koj yuav tsum tsis txhob siv tam sim ntawd thiab sab laj nrog kws kho hniav.
3. Kev xav txog kev cuam tshuam ib puag ncig
Nyob rau hauv xyoo tas los no, qhov cuam tshuam ntawm titanium dioxide sunscreens ntawm ib puag ncig tau maj mam nyiam. Cov kev tshawb fawb tau pom tias qee cov tshuaj pleev thaiv hnub uas muaj nano titanium dioxide yuav muaj kev cuam tshuam rau lub neej hauv hiav txwv tom qab nkag mus rau hauv dej hiav txwv. Yog li ntawd, thaum xaiv cov tshuaj pleev thaiv hnub, nws raug nquahu kom muab qhov tseem ceeb rau ib puag ncig tus phooj ywg cov qauv kom txo tau lub nra ntawm ib puag ncig.
IV. Qhov zoo thiab qhov tsis zoo ntawm titanium dioxide sunscreens
Qhov zoo
1. Kev tiv thaiv dav dav: Titanium dioxide sunscreens tuaj yeem tiv thaiv ob qho tib si UVA thiab UVB ultraviolet rays thiab tiv thaiv daim tawv nqaij.
2. Hypoallergenicity: Piv nrog tshuaj pleev thaiv hnub, titanium dioxide yog lub hnub ci lub cev nrog kev ua xua qis dua thiab tsim nyog rau cov tawv nqaij rhiab heev.
3. Kev ruaj ntseg siab: titanium dioxide tsis yooj yim rau decompose nyob rau hauv ultraviolet rays, thiab cov tshuaj pleev thaiv hnub siv tau ntev.
Qhov tsis zoo
1. Kev ntxhib los mos: Qee cov tshuaj pleev thaiv hnub titanium dioxide muaj cov xim tuab thiab tuaj yeem tshwm dawb tom qab thov, cuam tshuam rau daim tawv nqaij thiab pleev xim.
2. Muaj teeb meem rov qab siv dua: Cov tshuaj pleev thaiv hnub lub cev yuav tsum tau rov siv dua ntau zaus kom muaj kev tiv thaiv txuas ntxiv.
Xaus
Hauv cov ntsiab lus, cov tshuaj pleev thaiv hnub titanium dioxide raug suav tias yog kev xaiv tshuaj pleev thaiv hnub zoo thiab muaj txiaj ntsig raws li kev lees paub ntawm cov koom haum tso cai. Txawm li cas los xij, thaum siv nws, koj yuav tsum tau them sai sai rau cov yam ntxwv xws li qhov loj me, siv txoj kev thiab tus kheej ntawm daim tawv nqaij kom ntseeg tau tias muaj kev nyab xeeb thiab tshuaj pleev thaiv hnub. Nyob rau tib lub sijhawm, nrog rau kev paub txog kev tiv thaiv ib puag ncig, xaiv ib puag ncig tus phooj ywg tshuaj pleev thaiv hnub kuj yog lub luag haujlwm coj ua. Feem ntau, kev siv cov tshuaj pleev thaiv hnub titanium dioxide tsim nyog tuaj yeem tsis tsuas yog tiv thaiv UV kev puas tsuaj, tab sis kuj txo qhov tsis zoo ntawm daim tawv nqaij thiab ib puag ncig.