Txoj kev tawg ultraviolet (UV) yog ib feem ntawm lub teeb electromagnetic (lub teeb) spectrum uas ncav cuag lub ntiaj teb los ntawm lub hnub. Nws muaj cov wavelengths luv dua li lub teeb pom kev, ua rau nws tsis pom los ntawm lub qhov muag liab qab. Ultraviolet A (UVA) yog lub teeb UV ntev dua uas ua rau daim tawv nqaij puas tsuaj mus ntev, tawv nqaij laus, thiab tuaj yeem ua rau mob qog nqaij hlav. Ultraviolet B (UVB) yog lub teeb UV luv dua uas ua rau kub hnyiab, ua rau daim tawv nqaij puas tsuaj, thiab tuaj yeem ua rau mob qog nqaij hlav.
Cov tshuaj pleev thaiv hnub yog cov khoom sib txuas ua ke ntau cov khoom xyaw uas pab tiv thaiv tshav ntuj ultraviolet (UV) hluav taws xob los ntawm kev nkag mus rau ntawm daim tawv nqaij. Ob hom hluav taws xob ultraviolet, UVA thiab UVB, ua rau daim tawv nqaij puas thiab ua rau muaj kev pheej hmoo ntawm daim tawv nqaij. Cov tshuaj pleev thaiv hnub sib txawv hauv lawv lub peev xwm los tiv thaiv UVA thiab UVB.
Cov tshuaj pleev thaiv hnub tuaj yeem pab tiv thaiv kev mob qog noj ntshav ntawm daim tawv nqaij los ntawm kev tiv thaiv los ntawm lub hnub qhov teeb meem ultraviolet rays. American Academy of Dermatology pom zoo kom txhua tus siv tshuaj pleev thaiv hnub uas muaj cov hauv qab no: Broadspectrum kev tiv thaiv (tiv thaiv UVA thiab UVB rays) Sun Protection Factor (SPF) 30 lossis siab dua.
Diethylhexyl Butamido TriazoneNws yog ib qho khoom siv uas yooj yim nqus UVA thiab UVB hluav taws xob thiab feem ntau pom muaj nyob rau hauv cov tshuaj pleev thaiv hnub thiab lwm yam khoom siv hnub ci.
Vim nws zoo heev solubility nyob rau hauv ib tug ntau yam ntawm cov tshuaj pleev ib ce, tsuas yog cov theem qis yog xav tau kom muaj cov khoom xyaw txaus kom ncav cuag lub siab SPFs.
Siv nyob rau hauv cov concentrations txog li 10%. Nws lim UVB rays, thiab qee qhov UVA rays.
Broad spectrum UV absorber Muab qhov zoo tshaj plaws tiv thaiv tshav ntuj muaj kev sib koom ua ke nrog lwm cov UV lim -Cream Lotions Seums Deodorants Beauty Soaps Hmo ntuj serum Sunscreens Ua cov khoom / Xim tshuaj pleev ib ceSoluble nyob rau hauv cov roj theem ntawm emulsion Broad spectrum UV absorber Hydrophobic xwm thiab nws solubility nyob rau hauv cov roj ua kom yooj yim.
Diethylhexyl Butamido Triazoneyog ib qho tshuaj organic uas ua los ntawm triazine uas yooj yim nqus tau UVA thiab UVB. Iscotrizinol feem ntau pom muaj nyob rau hauv tshuaj pleev thaiv hnub thiab lwm yam khoom siv pleev thaiv hnub.
Lub sijhawm tshaj tawm: Cuaj hlis-14-2022