Ehlotyeni, ukusuka emva kwelanga, ulusu lwethu lutyhilelwa kwimpembelelo enkulu kakhulu, engakhokelela kuphela ekutshayeni, kodwa nokuba ngunobangela wezifo ezahlukeneyo. Ezi ziphumo zimpawu zobomi bemihla ngemihla esixekweni, ezikhoyo, ukuthetha ngeholide yolwandle. Ke ngoko, akunyanzelekanga ukuba ungayikhathaleli ukusetyenziswa kwelanga, ukhetho lwento eyahlukeneyo kwintengiso. Kodwa idibanisa enye - ubukho besiphumezo esimphuli kwiphakheji. Ngelishwa, kwi-Intanethi ulwazi oluninzi lwempikiswano malunga ne-SPF. Masibone ukuba inyani yile, kwaye apho kufanelekileyo.
Yintoni elinganiswe yi-SPF
I-SPF okanye into yokukhutshelwa ilanga luphawu olunemiqathango olunceda ulusu lwethu ukukhusela kwi-ultraviolet. Ilanga line-SPF lisuka kwi-6 ukuya kwi-50. Ngamanye amaxesha, babhala abantu abangama-50 +, kodwa ayicacanga, abaqondayo uMvelisi phantsi kweli nani.
Idijithi ime emva kokuba iileta ze-SPF zihlala zichazwa njengokunyuka kwelanga ngaphandle kweziphumo zolusu kwinani elichaziweyo lamaxesha. Oko kukuthi, ukuba ulusu lwakho kwiLanga lugcwele kwimizuzu eli-10 (kuxhomekeke kulusu, eli xabiso linokuvela kwimizuzu emi-5 ukuya kwengama-30, kubonakala ngathi, kusongeza iipropathi ze-10 × 20 = Imizuzu engama-200. Le nkcazo inomtsalane obalulekileyo: Ijika i-SPF 6 kunye ne-SPF 50 Khusela isikhumba ngokulinganayo, kuphela kwimpembelelo ininzi imizuzu engama-60 ithatha ipesenti ye-UV Imisebe, ukukhuselwa kwendlela ebonelela ngayo. I-SPF 15 izakukhusela ukusuka kwi-93.3%, i-SPF 30 - ukusuka kwi-96.7%, kunye ne-SPF 50 ivela kwi-98%. Akunyanzelekanga ukuba uthethe ngokhuseleko olukhulu ngakumbi ukuba lwenzeka, ke ngohlobo lwepesenti. Ngaphambili, abathengisi bobuqili, baqhutywa, babhala kwiiphakheji zexabiso le-SPF 100 kunye ne-150. Namhlanje ayivumelekanga, kuba ayinangqondo yomthengi.
Ukuba sithetha ngenqanaba lokhuseleko olungaphantsi kwe-15, ke, enyanisweni, ukusetyenziswa kweemali ezinjalo akwanele. Ngokuthetha ngokungqongqo, batsiba ngokwaneleyo ukuba basebenzise umonakalo wolusu. Umzekelo, nge-SPF 6 kulusu, i-16,7% yemitha iya kufumana, ethi, ngokuqinisekileyo, ayinakuthathwa njengedosi ekhuselekileyo.
Ihlala ixesha elingakanani ukhuseleko
Ixabiso le-SPF kufuneka lizimisele ngqo, ngokusekwe kulusu, kodwa hayi ukusuka ngexesha elifanelekileyo ukuba lichithe elangeni. Ukuba sithetha ngexesha lesiphumo, kuxhomekeke kuhlobo lweefiltha, kunye nohlobo lwempembelelo.
Iifilitha zekhemikhali (umzekelo, i-Autobenzon, eBenziphenone) kunye ne-tinc oxide okanye iTitanium diokside). Bahluke ngokomgaqo wokusebenza. Kwangelo xesha, izihluzo zekhemikhali ziya kusebenza xa zisetyenziswa kubomi bemihla ngemihla-elunxwemeni banokuzisela ingozi ngaphezu kokulungileyo. Kwiiyure ezimbini kamva, ubume babawo baqala ukuzitshintsha elangeni, kwaye kunokwenzeka ukubakhusela kuphela ukuthoba nokususa isixhobo.
Iifilitha zomzimba ziphantsi kwe-soothelthe, elunxwemeni kufanelekile ukuba zizisebenzise. Kodwa ngokuthe ngcembe baphulukana nokusebenziseka kwabo, njengoko behlamba okanye bacinyiwe ngenxa yeempembelelo zoomatshini. Ke kufuneka ihlaziywe rhoqo emva kweeyure ezingama-3-5, kunye nexesha lokuhlamba. I-Subscreens yamanzi etsala abathengi abathengileyo zenzelwe ukukhusela ulusu ngokuthe ngqo ngexesha lokubhukuda (Ewe, amanzi aphuphuma i-ultraviolet). Nangona kunjalo, emva kokuba ebuye elunxwemeni, ukhuseleko olunjalo nalo luye luhlaziywa.
Kwi-spectra yemitha ye-UV
Akunakwenzeka ukuba ungayikhankazi i-spectra ye-istraviolet rays. Imitha ye-spectrum kwi (i-UVB) ihlulelwe, enobangela ukutsha, kunye nemitha ye-spectrum, a (i-UVA) inoxanduva lokwaluphala lolusu. Ukusuka ekuqaleni kuthintela uninzi lwelanga. Ukukhusela kwi-spectrum rays, kwaye kukho uphawu lwe-UVA kwiphakheji. Ngenxa yokulunga kufuneka kuthiwe indlela yokuvezwa kwezi rays kulusu ayifundwa ngokupheleleyo, kwaye ezinye iingcali zithandabuza ukusebenza ngokukhuselekileyo kokhuseleko.
Ungatsho ngokuqinisekileyo ukuba kufanelekile ukusebenzisa ingcebiso eqhelekileyo ukunciphisa ukufota-ukunciphisa ixesha lokuhlala elangeni, musa ukuphuma ngaphandle kwe-12 ukuya kwi-15 iiyure. Ungalibali ukuba iimpahla eziqhelekileyo ziyaphulukana nenani elibonakalayo le-spectrum a aquye, oko kukuthi, ukhusela ngokuchasene nokutsha, kodwa engasigcini ekukhuleni, imbonakalo yemibimbi kunye ne-wigments kunye noxinzelelo.
Ngaba i-cosmetics ye-cosmetics ikhusela?
Ngokuphathelele i-cosmetics ye-cosmetity ene-SPF, iipropathi ezikhuselayo zayo aziphezulu kakhulu, kwaye ngelanga elinamandla, kungcono ukufaka isicelo selanga elikhethekileyo. Nangona kunjalo, rhoqo amayeza aneleyo. Umzekelo, ipowuni yokuhlobisa i-istraviolot ye-Ultraviolet, ibonelela ngokhuseleko lwe-SPF 15-20. Kwangelo xesha, ayinamanqaku e-pores yolusu, ebaluleke kakhulu ehlotyeni.
Akukho mfuneko yokuba unikele ingqalelo kwiindleko eziphezulu zeNgxowa-mali kunye nodumo lophawu. Ukusuka kwi-cosmetics ithembisa i-SPF engama-30 okanye engama-50, okanye ezinye izinto ezingazange zenziwe "ubudala, akufuneki ulindele into ekhethekileyo. Yonke le nto ayinto ngaphandle kwamagama. Elwandle lusasebenzisa inyani, kodwa iqinisekiswe ngokukhethekileyo kuthetha ukhuseleko oluqinisekileyo.