Iziyisisekelo zelanga
I-SPF imelela i- Sun Protection Factor , okubonisa ukuthi ukuvikelwa kosuku lokukhanya kwelanga kuyinikeza ngokumelene nemisebe ye-UVB nokushisa kwelanga.
Ngokuvamile, i-sunscreen ene:
- I-SPF 2 ivimbela ama-50 amaphesenti ama-UVB
- I-SPF 4 ivimbela amaphesenti angama-75 emisebe ye-UVB
- I-SPF 8 ivimbela amaphesenti angu-87 wemisebe ye-UVB
- I-SPF 15 ivimbela amaphesenti angu-93 emisebe ye-UVB
- I-SPF 30 ivimbela amaphesenti angu-97 emisebe ye-UVB
- I-SPF 50 imabhuloki angu-98 amaphesenti we-UVB
- I-SPF 100 ivimbela amaphesenti angu-99 wemisebe ye-UVB
Njengoba ubona, uma ufika ku-SPF 30, awutholi ukuvikelwa okungeziwe ngokwengeziwe ngokuya phezulu.
Ngenkathi ungasebenzisa ngokuqinisekile i-sunscreen nge-SPF 50+ ku-SPF 100+, gcina ukhumbule ukuthi abanikeli ngalokhu ukuvikeleka okwengeziwe. Ukusebenzisa isikrini selanga se-SPF esiphezulu kungase kube umbono omuhle kulabo abazali abangasebenzisi isitshalo esikhanyayo esanele futhi ungayifaki futhi.
Futhi, khumbula ukuthi i-SPF iyindlela kuphela yokusebenza emisebeni ye-UVB. Yingakho kubalulekile ukuthi abazali babe nesibhakabhaka esibanzi esine-spectrum okungenani okungenani ama-SPF 15 kuya ku-SPF 30, okufanele avimbele imisebe eminingi ye-UVA ne-UVB uma isetshenziswa kahle. Kufanele ugweme isikrini se-SPF esincane noma lotion lokwehla kwelanga, elinganikeli ukuvikelwa kwelanga elanele.
Ukulinganisa kwe-UVA Ukuvikelwa
Okwamanje ayikho indlela elula yokwazi ukuthi i-sunscreen iphumelela kanjani ngokumelene nemisebe ye-UVA. I-FDA entsha yokubhaliswa kwelanga, ngaphezu kokufaka isikhwama se-SPF 50+, kwakufanele ifake uhlelo olusha lwe-UVVA lwezinkanyezi ukuze abazali bakwazi ukubona kalula ukuthi ukukhanya kwelanga kuhlinzeka ukuvikelwa okuphansi kwe-UV (inkanyezi eyodwa) noma i-UVA ephezulu ukuvikelwa (izinkanyezi ezine).
Amalebula amasha azocaca nangokucacile uma isikrini selanga sinikelwa 'akukho ukuvikelwa kwe-UVA.'
Ngeshwa, i-Final Rule ekubhalweni kwelanga elisha yesikrini iqede uhlelo lwezinkanyezi, kucabanga ukuthi kuyodida kakhulu. Uma i-sunscreen manje ibizwa ngokuthi i-Broad Spectrum, ivikela ngokumelene nemisebe ye-UVA.
I-SPF Yezingubo
Izambatho zinesistimu yokulinganisa ehlukile efana nesilinganiso se-SPF sosikrini.
Noma kunjalo, esikhundleni sesilinganiso se-SPF, ezinye izingubo zinezinga le- Ultraviolet Protection Factor (UPF), elingaba ngu-15 (ukuvikelwa kwelanga elihle kuya ku-50 + (ukuvikelwa kwelanga elihle kakhulu) ukukhombisa ukuthi amaphesenti we-UVV ne-UVB imise ukuvimbela .
Ngakho-ke kusho ukuthini ngempela i-SPF?
Ngisho noma uqonda ukuthi i-sunscreen nge-SPF 15 ivimbela amaphesenti angu-93 emisebe ye-UVB, lokho kusho ukuthini ngempela ezweni langempela?
Indlela ewusizo yokucabanga ngayo ukuthi i-sunscreen ene-SPF 15 ikuvumela ukuba uhlale ilanga isikhathi eside izikhathi ezingu-15 kunokuba ungavinjelwe ngaphambi kokuba uthole ukushisa kwelanga. Ngokufanayo, i-sunscreen nge-SPF 30 kusho ukuthi ungaba ilanga izikhathi ezingu-30 ubude.
Njengoba kunzima ukusho ukuthi kuzothatha isikhathi esingakanani ukuthi umuntu oyedwa athole ukushisa kwelanga ngaphandle kokuvikelwa kwelanga, isikhathi eside izikhathi ezingu-15 nangama-30 ubude akusho neze. Kumele uthathe uhlobo lwesikhumba lomuntu, lapho bahlala khona, isikhathi sonyaka, ngisho nesikhathi sosuku ukuze bazi ukuthi bangahlala isikhathi esingakanani ilanga futhi bangatholi ukushisa kwelanga. Isibonelo, umuntu onokukhanya okukhanyayo elangeni eTexas ngo-2: 00 phakathi kwehlobo ngosuku oluphezulu lwe-UV luzoshisa kakhulu ngokushesha, mhlawumbe engaphansi kwemizuzu engu-15, ngo-6pm ngokushesha kunomuntu ophethe ubumnyama obumnyama e-Idaho ngo-6 ntambama ebusika.
Ezinye izinto ezizokwenza ingozi yengane yakho yokuthola ukushisa ilanga ngokushesha ihlanganisa ukuphuza imithi ethile, kuhlanganise nemithi eminingi esetshenziselwa ukwelapha izinkuni , ekubeni endaweni ephakeme kakhulu, nokuba yindawo ebuseduze engase ibonise ilanga, njengeqhwa nesihlabathi.
Futhi khumbula ukuthi i-sunscreen iyasebenza kangcono ngemuva kwamahora amabili futhi idinga ukusetshenziselwa kabusha, ngakho-ke i-sunscreen ye-SPF 50 ngeke ikuvumele ukuba uhlale ilanga izikhathi ezingamashumi ayisihlanu kunokuba ungavikelekile ngaphambi kokushisa ilanga.
Ukubizwa ngegama: SPF
Futhi eyaziwa njenge: Sun Protection Factor, SPF Protection
Izibonelo: Isikrini selanga esine-SPF 4 asihlinzeki ngokuvikela ilanga ngokwanele kwezingane.
> Wang, Steven Q. Isimo samanje sesimiso somshini wokushisa ilanga e-United States: Isimiso sokugcina sezokudla kanye nezidakamizwa sika-2011 ekubhalweni nasekusebenziseni ukuphumelela. J Am Acad Dermatol. Agasti 5, 2011.