Kumvetsetsa Zowonongeka kwa dzuwa
SPF ikuyimira Chowopsa cha Sun Protection. Mwachidule, mawonekedwe a SPF amakuuzani momwe mungathere dzuwa nthawi yaitali popanda kutenthedwa pamene mukuvekedwa ndi dzuwa, poyerekezera ndi nthawi yotani yomwe mungakhalebe dzuwa musanatenthe popanda kuvala sunscreen. Mwachitsanzo, ngati mumatenga mphindi 15 kuti muwotchere popanda kuwala kwa dzuwa ndipo mumagwiritsa ntchito SPF 10, zimatenga nthawi 10 kuti muwotche, kapena maola 2.5.
Momwe SPF imatsimikizire
Nambala ya SPF imatsimikiziridwa kupyolera mu kuyesa kwapakati, powonetsa nkhani zaumunthu kumalo owala omwe amatanthawuza kufanana ndi dzuwa la masana-pamene kuwala kwa dzuwa kumakhala kovuta kwambiri. Nkhani zina zimakhala ndi mawonekedwe a dzuwa komanso ena samatero. Kuchuluka kwa kuwala kumene kumachititsa khungu lofiira pa khungu lotetezedwa ndi dzuwa, logawidwa ndi kuchuluka kwa kuwala komwe kumapangitsa kufiira mu khungu losatetezedwa ndi SPF.
Zimene SPF Namba Zimatanthauza
SPF yapamwamba sichisonyeza kuti dzuwa limatetezedwa kwambiri-limasonyeza kuti mudzatetezedwa ku dzuwa kwa nthawi yaitali. Mwachitsanzo, SPF 2 imateteza khungu lanu mogwira mtima monga SPF 30. Komabe, SPF 2 iyenera kugwiritsidwa ntchito mobwerezabwereza. Kuti mukhale otetezeka, mosasamala kanthu kuti mumasankha SPF, ndi bwino kubwezeranso kuwala kwa dzuwa osachepera maola awiri aliwonse, komanso mutatha kusambira kapena kutuluka thukuta. Ndipotu, American Academy of Dermatology amalimbikitsa SPF 30 kugwiritsa ntchito khungu lonse.
Chitetezo cha dzuwa Chotambasula
SPF imangoteteza kuteteza kuwala kwa dzuwa kwa dzuwa, zomwe zimatchedwa UVB mwachidule. Poyamba, mazira a UVB ankaganiziridwa kuti ndiwo mazira okha omwe amawopsyeza, chifukwa ali ofupika m'litali ndipo amayambitsa kutentha kwa dzuwa. Komabe, zinazindikiranso kuti mazira a UVA amachitanso ngozi.
Amayambitsa khungu ndikuthandiza kansalu ya khungu. SPF yokha sichiteteza kumayendedwe a UVA, kotero kuti pakhale dzuwa lotetezedwa bwino, yang'anani chotsegula dzuwa kapena dzuwa lomwe limapereka chitetezo cha UVA ndi UVB -chiyenera kunena "chiwonetsero chachikulu" kapena "full spectrum" pa chizindikiro ndi iyenera kukhala ndi SPF ya osachepera 30.
SPF zovala
Kuvala zovala zotetezedwa ndi dzuwa ndi njira yowonjezera yambiri yomwe mungatenge, kupitirira kuvala chofiira cha dzuwa, kuti muteteze khungu lanu ku dzuwa. Ndilo lingaliro lapadera kwa ana aang'ono, ogwira ntchito omwe angavutike kukhala pansi kwa mphindi zingapo pamene kholo likuyesera kugwiritsa ntchito kutentha kwa dzuwa, makamaka omwe nthawi zambiri amachoka kapena kutuluka m'nyanja, nyanja, kapena nyanja.
Koma khalani okonzeka kuti mumagula zovala zotani za dzuwa. Zoonadi, malaya apamwamba amatsegula khungu lambiri ndipo amapereka dzuwa loteteza kuposa thanki, ndipo chikwama chokwanira chikuteteza nkhopeyo kuposa chipewa cha mpira. Koma ngakhale mutaphimbidwa zovala kuchokera kumutu mpaka kumapazi, zovala zimenezo sizothandiza kwambiri ngati dzuŵa lingapangitse njira yake kudutsa m'mwamba.
Nsaluzi zimapangidwa kuchokera ku ulusi wopangidwa kapena wopangidwa pamodzi, ndipo ngati nsalu ikuyang'aniridwa ndi microscope, mipata yomwe ilipo pakati pa makinawo amaonekera.
Mazira a UV amatha kudutsa m'madera amenewo ndikufikira khungu. Nsalu yowonjezereka kwambiri, monga denim, ndizochepa kuti mazira a UV akhoza kudutsa. Nsalu yolimba kwambiri yofanana, monga nsalu, ndizowonjezeratu kuti kuwala kwa dzuwa kungathe kudutsa.
Mwamwayi, zofewa, zokometsetsa nsalu monga nsalu ndi thonje zimakhala ndi masamba otseguka omwe amalola kuti kuwala kwa dzuwa kukudutse. Kotero ngati muvala zinthu ngati izi, muyenera kugwiritsa ntchito SPF kwa ziwalo za thupi lanu zomwe zatchulidwa, malingana ndi nsalu imene mukuvala.
Zovala za UPF ndi zobvala zopangidwa ndi chinthu chomwe chimatchedwa ultraviolet chitetezo.
Chitsanzo chimodzi cha chizindikiro chomwe chimagwiritsa ntchito UPF chovala ichi ndi Coolibar, chomwe chimapanga zovala ndi zothandizira amuna, akazi, anyamata, ndi atsikana. Zovala za UPF zikukhala zofala kwambiri, makamaka zovala za ana komanso zovala zapamwamba ngati alonda.
Chitsime:
http://www.skincancer.org/prevention/sun-protection/clothing/protection