Nyob rau lub caij ntuj sov, txij qab lub hnub, peb cov tawv nqaij raug nthuav tawm cov nyhuv muaj zog heev, uas tsis yog tuaj yeem ua rau muaj kev kub ntxhov, tab sis kuj yuav ua rau muaj ntau yam mob. Cov teebmeem no yog cov xeeb ceem ntawm lub neej txhua hnub hauv nroog, uas yog, los tham txog lub hnub so puam. Yog li ntawd, nws tsis tsim nyog yuav tsis saib xyuas kev siv tshuaj pleev thaiv hnub, qhov kev xaiv ntawm uas yog ntau sib txawv ntawm kev ua lag luam. Tab sis nws txuas ntxiv lawv ib - muaj ntawm SPRF ntawm pob. Hmoov tsis zoo, nyob rau hauv Is Taws Nem muaj ntau cov ntaub ntawv sib cav txog SPF. Cia peb xyuas seb qhov twg qhov tseeb yog, thiab qhov twg cov ntawv tseeb.
Dab tsi yog ntsuas los ntawm SPF
SPF lossis hnub tiv thaiv kev tiv thaiv cov xeeb ceem uas pab peb cov tawv nqaij tiv thaiv ultraviolet. Sunsters muaj SPF los ntawm 6 txog 50. Muaj qee kis, lawv sau 50+, tab sis nws tsis pom tseeb, uas nkag siab cov chaw tsim khoom nyob hauv tus lej no.
Tus lej sawv tom qab cov tsiaj ntawv SPF feem ntau tau piav qhia raws li kev nce hauv lub hnub tsis muaj kev rau txim rau daim tawv nqaij hauv lub sijhawm tshwj xeeb. Qhov ntawd yog, yog tias koj cov tawv nqaij thaum lub hnub ci ntsa iab hauv 10 feeb (nyob ntawm seb 5 feeb li cas, nws zoo li, sijhawm ntev ntawm cov khoom tiv thaiv los ntawm 10 × 20 = 200 feeb. Qhov kev piav qhia no muaj qhov tsis txaus ntseeg: nws hloov tawm tias SPF 6 thiab hauv thawj kis cov nyhuv ntev, thiab thib ob - 500. Qhov tseeb ntawm tus nqi ntawm UV Rays, kev tiv thaiv ntawm uas muab txhais tau tias. SPF 15 yuav tiv thaiv los ntawm 93.3%, SPF 30 - los ntawm 96.7%, thiab SPF 50 yog los ntawm 98%. Nws tsis tas yuav tham txog kev tiv thaiv ntau dua yog tias nws siv sijhawm, tom qab ntawd tsuas yog nyob rau hauv daim ntawv ntawm ib feem pua. Yav dhau los, cunning cov neeg ua lag luam, nqa tawm, tau sau rau ntawm cov pob tus nqi ntawm SPF 100 thiab 150. Niaj hnub no txwv tsis pub thiab xiam oob qhab tus neeg siv khoom.
Yog tias peb tham txog theem ntawm kev tiv thaiv tsawg dua 15, tom qab ntawd, qhov tseeb, kev siv cov nyiaj ntawd tsis txaus. Nruj me ntsis kev hais lus, lawv hla cov ultraviolet los thov cov tawv nqaij puas tsuaj. Piv txwv li, nrog SPF 6 rau daim tawv nqaij 6 rau ntawm daim tawv nqaij, 16.7% ntawm cov Rays yuav tau txais, uas, tau tseeb suav tau tias muaj tshuaj.
Ntev npaum li cas yog kev tiv thaiv
Tus nqi SPF koj yuav tsum tau txiav txim siab ncaj qha, raws li hom tawv nqaij, tab sis tsis yog txij li lub sijhawm nws yuav tsum siv sijhawm nyob rau hauv lub hnub. Yog tias peb tham txog lub sijhawm muaj txiaj ntsig, nws nyob ntawm cov lim dej, ntxiv rau ntawm qhov cuam tshuam.
Lim tshuaj yog tshuaj lom neeg (piv txwv, autobenzon, benzophenone) thiab lub cev (zinc oxide lossis titanium dioxide). Lawv txawv ntawm cov ntsiab cai ntawm kev ua haujlwm. Tib lub sijhawm, lim dej yuav ua tau zoo thaum siv hauv lub neej txhua hnub - ntawm lub puam lawv tuaj yeem coj kev ua phem ntau dua li qhov kev ua phem ntau dua. Ob teev tom qab, tus qauv ntawm lawv pib hloov lawv nyob rau hauv lub hnub, thiab nws muaj peev xwm tiv thaiv lawv tsuas yog kho kom zoo thiab rov kho cov cuab yeej.
Lub cev lim lub cev tsis tshua muaj sootheliva, ntawm lub puam nws yog tsim nyog siv lawv. Tab sis lawv maj poob lawv cov txiaj ntsig, raws li lawv ntxuav tawm lossis lwv tawm los ntawm kev siv tshuab. Yog li lawv yuav tsum tau hloov kho txhua txhua 3 3-5 teev, nrog rau txhua lub sijhawm tom qab da dej. Waterproof Sunscreens uas nyiam cov neeg siv khoom lag luam yog tsim los tiv thaiv cov tawv nqaij ncaj qha thaum ua luam dej (yog, dej kuj nco ultraviolet). Txawm li cas los xij, tom qab rov qab mus rau ntug dej, yuav tsum tau txuas ntxiv dua tshiab.
Ntawm lub spectra ntawm UV hluav taws xob
Nws yog tsis yooj yim sua kom tsis txhob hais txog spectra ntawm ultraviolet rays. Cov duab ntawm lub spectrum hauv (UVB) yog qhov txawv, uas ua rau kub hnyiab, thiab cov duab ci ntawm lub spectrum, a (UVA) lub luag haujlwm rau kev laus ntawm daim tawv nqaij. Los ntawm thawj tiv thaiv feem ntau sunscreens. Txhawm rau tiv thaiv cov teeb meem hluav taws xob, thiab muaj txhais tau tias nrog lub cim ntawm UVA ntawm pob. Lub hom phiaj ntawm kev ncaj ncees yuav tsum tau hais tias kev sib tw ntawm cov duab hluav taws xob ntawm daim tawv nqaij tsis yog kawm tiav, thiab qee cov kws txawj ua xyem xyav ntawm cov kev tiv thaiv zoo li no.
Koj tuaj yeem hais kom paub tseeb tias nws yog tus nqi siv cov lus qhia kev pab kom txo lub sijhawm photorement - kom txo lub hnub, tsis txhob mus sab nraud thaum lub hnub ci tshaj plaws - los ntawm 12 mus rau 15 teev. Tsis txhob hnov qab tias cov khaub ncaws zoo ib txwm tseem ceeb ntawm cov spectrum rays a, uas yog, tiv thaiv kev laus, tsos ntawm wrinkles thiab pigmentation.
Puas yog cov tshuaj pleev ib ce hniav tawv?
Raws li rau cov tshuaj pleev ib ce hniav zoo nkauj nrog SPF, kev tiv thaiv kev tiv thaiv ntawm nws tsis yog ntau, thiab muaj qhov zoo dua los tseem siv cov hnub ci tshwj xeeb. Txawm li cas los xij, feem ntau cov tshuaj pleev ib ce. Piv txwv li, cov hmoov zoo nkauj yog qhov zoo nqus cov ultraviolet, muab SPF 15-20 tiv thaiv. Nyob rau tib lub sijhawm, nws tsis tau teeb meem cov tawv nqaij hws, uas tseem ceeb heev rau lub caij ntuj sov.
Nws tsis tas yuav tsum them sai sai rau tus nqi siab ntawm cov nyiaj thiab muaj koob meej ntawm lub hom. Los ntawm cov tshuaj pleev ib ce Spf 30 lossis 50, lossis lwm yam tsis tau muaj hnub nyoog "los tiv thaiv hnub nyoog" cov khoom, koj yuav tsum tsis txhob cia siab tias qhov tshwj xeeb. Tag nrho cov no tsis muaj dab tsi ntau tshaj li cov lus. Ntawm lub puam tseem siv cov dog dig, tab sis cov pov thawj tshwj xeeb txhais tau tias yuav ua kom muaj kev tiv thaiv kev tiv thaiv.