Kodi zotsatira za mafuta oteteza ku dzuwa ndi ziti ndipo mungagwiritse ntchito bwanji moyenera? Kodi mungasankhe bwanji mafuta oteteza ku dzuwa omwe akukuyenererani?

Kugawa kwa mafuta oteteza ku dzuwa

Choteteza ku dzuwa chimatanthauza zodzoladzola zomwe zimawonjezeredwa ndi zinthu zoteteza ku dzuwa zomwe zimatha kuletsa kapena kuyamwa kuwala kwa ultraviolet kuti khungu lisapse ndi kutentha ndi dzuwa. Malinga ndi mfundo yoteteza ku dzuwa, choteteza ku dzuwa chingagawidwe m'magulu awiri: choteteza ku dzuwa ndi mankhwala.

Mafuta oteteza ku dzuwa omwe amateteza ku dzuwa

Chodzoladzola cha dzuwa chakuthupi, monga momwe dzinalo likusonyezera, chimagwiritsa ntchito mfundo za fizikisi. Tinthu ta atomu ta chodzoladzola ichi chimakhala ngati ming'alu. Chikafalikira pankhope, chimagwira ntchito ngati galasi, kuwonetsa kuwala kwa dzuwa kuti chikwaniritse cholinga choteteza ku dzuwa. Titanium dioxide ndi zinc oxide zonse ndi zosakaniza za sunscreen yakuthupi. Zitha kupanga filimu yoteteza pakhungu kuti kuwala kwa ultraviolet kusalowe pamwamba pa khungu. Zonsezi zimatha kupereka chitetezo chokwanira cha UVB, chomwe zinc oxide imatha kuletsa UVA bwino. Zosakaniza za sunscreen yakuthupi zimakhala zoyera komanso zofiirira, ndipo zimakhala zabuluu zikagwiritsidwa ntchito m'madzi. Komabe, mtundu uwu wa chinthu ulinso ndi zofooka zina: kwa anthu omwe ali ndi khungu lakuda, kupukuta sikungakhale kwachilengedwe; kwa anthu omwe ali ndi khungu louma, silikunyowetsa mokwanira; siliyenera kugwiritsa ntchito sunscreen ya thupi lonse; zodzoladzola zodzola ziyenera kugwiritsidwa ntchito kuti zichotsedwe bwino, ndi zina zotero.

mankhwala oteteza ku dzuwa

Mafuta oteteza ku dzuwa pogwiritsa ntchito mankhwala ndi kugwiritsa ntchito zosakaniza za mankhwala kuti ateteze ku dzuwa. Mtundu uwu wa mafuta oteteza ku dzuwa umagwiritsa ntchito mfundo yoyamwa kuti ateteze ku dzuwa. Ndi chinthu chopatsa kuwala chomwe chingathe kuyamwa kuwala kwa ultraviolet ndikusandutsa mphamvu ya kugwedezeka kwa mamolekyulu kapena mphamvu yotentha kuti chikwaniritse zotsatira za chitetezo cha dzuwa, monga amino acid. Benzoic acid ndi zotumphukira zake, cinnamic acid, ndi zina zotero. Akagwiritsidwa ntchito pankhope, maatomu amayamwa kuwala kwa dzuwa kuti asafike pakhungu. Mwachidule, mafuta oteteza ku dzuwa ndi abwino kuposa mafuta oteteza ku dzuwa pogwiritsa ntchito mankhwala, koma pakadali pano ambiri mwa iwo omwe ali pamsika ndi mafuta oteteza ku dzuwa pogwiritsa ntchito mankhwala.

Kugawa kwa mafuta oteteza ku dzuwa

Choteteza ku dzuwa chimatanthauza zodzoladzola zomwe zimawonjezeredwa ndi zinthu zoteteza ku dzuwa zomwe zimatha kuletsa kapena kuyamwa kuwala kwa ultraviolet kuti khungu lisapse ndi kutentha ndi dzuwa. Malinga ndi mfundo yoteteza ku dzuwa, choteteza ku dzuwa chingagawidwe m'magulu awiri: choteteza ku dzuwa ndi mankhwala.

Mafuta oteteza ku dzuwa omwe amateteza ku dzuwa

Chodzoladzola cha dzuwa chakuthupi, monga momwe dzinalo likusonyezera, chimagwiritsa ntchito mfundo za fizikisi. Tinthu ta atomu ta chodzoladzola ichi chimakhala ngati ming'alu. Chikafalikira pankhope, chimagwira ntchito ngati galasi, kuwonetsa kuwala kwa dzuwa kuti chikwaniritse cholinga choteteza ku dzuwa. Titanium dioxide ndi zinc oxide zonse ndi zosakaniza za sunscreen yakuthupi. Zitha kupanga filimu yoteteza pakhungu kuti kuwala kwa ultraviolet kusalowe pamwamba pa khungu. Zonsezi zimatha kupereka chitetezo chokwanira cha UVB, chomwe zinc oxide imatha kuletsa UVA bwino. Zosakaniza za sunscreen yakuthupi zimakhala zoyera komanso zofiirira, ndipo zimakhala zabuluu zikagwiritsidwa ntchito m'madzi. Komabe, mtundu uwu wa chinthu ulinso ndi zofooka zina: kwa anthu omwe ali ndi khungu lakuda, kupukuta sikungakhale kwachilengedwe; kwa anthu omwe ali ndi khungu louma, silikunyowetsa mokwanira; siliyenera kugwiritsa ntchito sunscreen ya thupi lonse; zodzoladzola zodzola ziyenera kugwiritsidwa ntchito kuti zichotsedwe bwino, ndi zina zotero.

mankhwala oteteza ku dzuwa

Mafuta oteteza ku dzuwa pogwiritsa ntchito mankhwala ndi kugwiritsa ntchito zosakaniza za mankhwala kuti ateteze ku dzuwa. Mtundu uwu wa mafuta oteteza ku dzuwa umagwiritsa ntchito mfundo yoyamwa kuti ateteze ku dzuwa. Ndi chinthu chopatsa kuwala chomwe chingathe kuyamwa kuwala kwa ultraviolet ndikusandutsa mphamvu ya kugwedezeka kwa mamolekyulu kapena mphamvu yotentha kuti chikwaniritse zotsatira za chitetezo cha dzuwa, monga amino acid. Benzoic acid ndi zotumphukira zake, cinnamic acid, ndi zina zotero. Akagwiritsidwa ntchito pankhope, maatomu amayamwa kuwala kwa dzuwa kuti asafike pakhungu. Mwachidule, mafuta oteteza ku dzuwa ndi abwino kuposa mafuta oteteza ku dzuwa pogwiritsa ntchito mankhwala, koma pakadali pano ambiri mwa iwo omwe ali pamsika ndi mafuta oteteza ku dzuwa pogwiritsa ntchito mankhwala.

Malangizo Ogwiritsira Ntchito Mafuta Oteteza Ku dzuwa

1. Malo ogwiritsira ntchito

Mukapaka mafuta oteteza ku dzuwa, musamanyalanyaze khosi lanu, chibwano, makutu ndi malo ena kuti khungu lanu lisafanane.

2. Zinthu zotsukira

Onetsetsani kuti mwachotsa mafuta oteteza ku dzuwa usiku uliwonse, choncho musapumule ndi kugona mutavala.

3. Gwiritsani ntchito kuchuluka kokwanira

Mafuta oteteza ku dzuwa sagwira ntchito pongogwiritsa ntchito, koma ayenera kufika pamlingo winawake kuti agwire ntchito. Nthawi zambiri, kuchuluka kwa mafuta oteteza ku dzuwa omwe amaikidwa pakhungu ndi 2 mg pa sikweya sentimita imodzi kuti akwaniritse chitetezo cha dzuwa chomwe mukufuna. Dziwani kuti kuchuluka kwa SPF sikungasonkhanitsidwe. Kugwiritsa ntchito zigawo ziwiri za mafuta oteteza ku dzuwa a SPF10 kudzakhala ndi mphamvu yoteteza ya gawo limodzi la SPF10.

4. Musasakanize mafuta oteteza ku dzuwa ochokera ku mitundu yosiyanasiyana

Kugwiritsa ntchito mosakaniza kungapangitse kuti khungu lizipsa. Zosakaniza za mafuta oteteza ku dzuwa amitundu yosiyanasiyana sizigwirizana. Ngati zisakanizidwa ndi kusakanikirana pakhungu, zosakanizazo zitha kusokonezana kapena kusokonezana, kuchepetsa mphamvu ya mafuta oteteza ku dzuwa, komanso kuyambitsa ziwengo pakhungu.

5. Samalani kusunga ndalama

Mafuta odzola padzuwa sangathandize ngati agwiritsidwa ntchito kutentha kapena kuwala kwa dzuwa kwa nthawi yayitali. Musagwiritse ntchito zodzoladzola zowononga khungu chifukwa sizimangochepetsa mphamvu ya mafuta odzola padzuwa komanso zimatha kukwiyitsa khungu.

6. Samalani ndi malo obisika omwe amateteza ku dzuwa

Mukapaka mafuta oteteza ku dzuwa wamba, muyeneranso kusamala ndi khungu la maso ndi milomo yanu. Komabe, ngati palibe malangizo, kapena ngati mugwiritsa ntchito zinthu zoteteza ku dzuwa m'maso, musagwiritse ntchito pakhungu lozungulira maso.

Mitundu yosiyanasiyana ya khungu, njira zosiyanasiyana zogulira

M'chilimwe, kapangidwe ka khungu kamasintha chifukwa cha kusiyana kwa mafuta omwe amatulutsa. Chifukwa chake, anthu ayenera kuyesanso khungu molondola asanagule. Khungu lamafuta liyenera kusankha zinthu zoteteza ku dzuwa zochokera m'madzi zomwe zimalowa mwamphamvu; khungu louma liyenera kusankha zinthu zoteteza ku dzuwa zochokera ku kirimu; nthawi zambiri palibe malamulo okhwima okhudza khungu lopanda khungu, ndipo khungu la emulsion liyenera mitundu yonse ya khungu. Mitundu yosiyanasiyana ya khungu iyenera kusankha mitundu yosiyanasiyana ya zoteteza ku dzuwa.

Khungu lamafuta:

Muyenera kusankha mafuta oteteza ku dzuwa omwe ali ndi madzi, opanda mafuta, omwe ali ndi mphamvu yolowa mkati, omwe ndi otsitsimula komanso osapaka mafuta ndipo samatseka ma pores. Musagwiritse ntchito mafuta oteteza ku dzuwa, ndipo gwiritsani ntchito mankhwala oteteza ku dzuwa mosamala.

Khungu lofanana ndi ziphuphu:

Sankhani mafuta oteteza ku dzuwa okhala ndi madzi, opanda mafuta, komanso amphamvu kwambiri. Ziphuphu zikakula kwambiri, muyenera kusiya kugwiritsa ntchito mafuta oteteza ku dzuwa, ndipo mungagwiritse ntchito njira zodzitetezera ku dzuwa potuluka.

Khungu louma:

Anthu omwe ali ndi khungu louma ayenera kusankha mafuta oteteza khungu ku dzuwa omwe ali ndi chinyezi komanso omwe ali ndi mphamvu zowonjezera komanso amalimbitsa chitetezo cha mthupi. Mafuta ambiri oteteza khungu ku dzuwa ali ndi mphamvu zowonjezera komanso zoteteza ku dzuwa.

Khungu lofewa:

Kwa khungu lofewa, ndi bwino kusankha mafuta oteteza ku dzuwa omwe amapangidwa mwapadera kwa khungu lofewa kapena mafuta oteteza ku dzuwa.

SPF

Masiku ano, zinthu zonse zoteteza ku dzuwa zimalembedwa mwapadera ndi SPF. SPF ndi manambala otsatirawa akusonyeza mphamvu yoteteza ku dzuwa yomwe mankhwalawa ali nayo. Ogula amatha kusintha mphamvu ya SPF ya dzuwa lomwe amafunika kugula okha. Anthu ambiri amaona mphamvu ya SPF ngati njira yaikulu yotetezera ku dzuwa. SPF ndi chidule cha Chingerezi cha SUN proteetion Factor. Izi zikusonyeza momwe mphamvu ya dzuwa ingakhalire yokwera kapena yotsika popewa kuwononga ku dzuwa. Gawo la SPF: SPF=mlingo wocheperako wa erythema (mutagwiritsa ntchito zinthu zoteteza ku dzuwa) )/mlingo wocheperako wa erythema (musanayambe kugwiritsa ntchito kutetezera ku dzuwa).

Mwachitsanzo, ngati khungu lanu lili ndi mlingo wocheperako wa erythema wa mphindi 15, ngati mugwiritsa ntchito mafuta oteteza ku dzuwa ndi SPF 4, mwachionekere mutha kukhala padzuwa kwa nthawi 4, zomwe ndi mphindi 60. Pambuyo pa mphindi 60, khungu lanu lidzasanduka lofiira. Ngati mukugwiritsa ntchito mafuta oteteza ku dzuwa a SPF8, mutha kukhala padzuwa kwa nthawi 8 zomwe ndi mphindi 120, ndi zina zotero.

Kawirikawiri, chizindikiro cha SPF chikakhala chachikulu, chitetezo chake chimakhala chachikulu. Nthawi zonse, anthu omwe ali ndi khungu labwinobwino ayenera kugwiritsa ntchito zodzoladzola za dzuwa zomwe zili ndi SPF 8 mpaka 12; omwe ali ndi khungu loyera ayenera kugwiritsa ntchito SPF 30; anthu omwe ali ndi vuto la kuwala ayenera kusankha zodzoladzola za dzuwa zomwe zili ndi SPF pakati pa 12 ndi 20. Ogwira ntchito muofesi amangokumana ndi dzuwa akamapita kuntchito komanso akamachoka kuntchito, kotero SPF iyenera kukhala pansi pa 15. Kwa alendo omwe amachita zinthu zakunja, ndi bwino kugwiritsa ntchito zodzoladzola za dzuwa zomwe zili ndi SPF20 kapena kuposerapo. Mukamachita masewera olimbitsa thupi pansi pa dzuwa lotentha kwambiri paphiri kapena kusambira pagombe, muyenera kugwiritsa ntchito zodzoladzola za dzuwa za SPF30. Ndikoyenera kusankha zodzoladzola za khungu zomwe sizilowa madzi mukasambira panja, koma kupatula kusambira, zodzoladzola za khungu zomwe sizilowa madzi ziyenera kugwiritsidwa ntchito pang'ono.

Zosamala mukamagula

1. Kuyesa khungu

Ndikoyenera kuyesa khungu molondola musanagule mafuta oteteza ku dzuwa. Khungu lamafuta liyenera kusankha mafuta oteteza ku dzuwa ochokera m'madzi omwe amalowa mwamphamvu; khungu louma liyenera kusankha mafuta oteteza ku dzuwa; khungu lapakati nthawi zambiri silikhala ndi zofunikira zokhwima, ndipo mafuta oteteza ku dzuwa ochokera ku emulsion ndi oyenera mitundu yonse ya khungu.

2. Werengani mtengo wa SPF

Kawirikawiri, chiŵerengero cha SPF chikakhala chachikulu, nthawi yodzitetezera imatalikirapo.

3. Mvetsetsani magulu oyenera a zodzoladzola zosiyanasiyana za dzuwa

Mankhwala osiyanasiyana oteteza ku dzuwa ndi oyenera anthu osiyanasiyana. Njira yabwino ndiyo kuyesa mkati mwa dzanja lanu musanagule. Ngati khungu lifiira, kutupa, kupweteka, kapena kuyabwa mkati mwa mphindi 10, zikutanthauza kuti muli ndi vuto la ziwengo ndi mankhwalawa. Mutha kuyesa mankhwala okhala ndi SPF yocheperapo kamodzi kuposa iyi. Ngati pali vuto, ndi bwino kusiya kugwiritsa ntchito mtundu wa mafuta oteteza ku dzuwa.

4. Kuyesa khalidwe la khungu

Chifukwa cha kusiyana kwa mafuta otuluka, mtundu wa khungu umasintha, kotero mayeso a mtundu wa khungu ayenera kuchitidwa. Khungu la mafuta liyenera kusankha zotsukira thovu zomwe zili ndi mphamvu yoyeretsa kwambiri komanso zotsukira dzuwa zochokera m'madzi zomwe zimalowa mwamphamvu; khungu louma liyenera kusankha zotsukira mkaka ndi zotsukira dzuwa zodzola; khungu lopanda khungu lili ndi njira zambiri. Mafuta odzola ndi opopera ndi oyenera mitundu yonse ya khungu.