Njengoko imfuno yokukhusela ilanga ngempumelelo iqhubeka ikhula, ishishini lezithambiso liye labona utshintsho olukhulu kwizithako ezisetyenziswa kwizithambiso zelanga zamakhemikhali. Eli nqaku liphonononga uhambo lokuqhubela phambili kwezithako kwizithambiso zelanga zamakhemikhali, ligxininisa impembelelo yotshintsho kwiimveliso zokukhusela ilanga zanamhlanje.
Uphando Lwezithako Zasekuqaleni:
Kwinqanaba lokuqala lezinto zokugcoba ilanga, izithako zendalo ezifana neziqwenga zezityalo, iiminerali, kunye neeoyile zazisetyenziswa kakhulu ukubonelela ngokhuseleko olulinganiselweyo elangeni. Nangona ezi zithako zazinika inqanaba elithile lokuthintela imitha ye-UV, ukusebenza kwazo kwakuncinci kwaye zazingenazo iziphumo ezifunekayo ezihlala ixesha elide.
Intshayelelo yeeFiltha ze-Organic:
Impumelelo kwi-sunscreens yamakhemikhali yeza nokwaziswa kwezihluzi ze-organic, ezaziwa ngokuba zi-UV absorbers. Phakathi kwinkulungwane yama-20, izazinzulu zaqala ukuphonononga iikhompawundi ze-organic ezikwaziyo ukufunxa imitha ye-UV. I-Benzyl salicylate yavela njengovulindlela kweli candelo, inika ukhuseleko oluphakathi lwe-UV. Nangona kunjalo, uphando olongezelelweyo lwalufuneka ukuphucula ukusebenza kwayo.
Uphuhliso kwi-UVB Protection:
Ukufunyanwa kwe-para-aminobenzoic acid (PABA) ngeminyaka yoo-1940 kwaphawula inyathelo elibalulekileyo ekukhuseleni ilanga. I-PABA yaba sisithako esiphambili kwi-sunscreens, ifunxa ngempumelelo imisebe ye-UVB ebangela ukutsha lilanga. Nangona isebenza kakuhle, i-PABA yayinemida, efana nokurhawuzelelwa lusu kunye ne-allergies, nto leyo eyabangela ukuba kufuneke ezinye izithako.
Ukhuselo lwe-Broad-Spectrum:
Njengoko ulwazi lwesayensi lwalusanda, ingqwalasela yatshintshela ekuphuhliseni izithako ezinokukhusela kwimitha ye-UVB kunye ne-UVA. Kwiminyaka yoo-1980, i-avobenzone yavela njengesihluzo esisebenzayo se-UVA, incedisa ukhuseleko lwe-UVB olukhoyo olunikezelwa zizikhuseli zelanga ezisekelwe kwi-PABA. Nangona kunjalo, ukuzinza kwe-avobenzone phantsi kwelanga kwakuyingxaki, nto leyo eyakhokelela ekuphuhlisweni ngakumbi.
Ukuzinza kwefoto kunye noKhuseleko lwe-UVA oluphuculweyo:
Ukujongana nokungazinzi kwee-UVA filters zakuqala, abaphandi bagxile ekuphuculeni ukuzinza kwefoto kunye nokukhuselwa kwe-wide-spectrum. Izithako ezifana ne-octocrylene kunye ne-bemotrizinol zenziwe, zibonelela ngozinzo oluphuculweyo kunye nokhuseleko oluphezulu lwe-UVA. Olu phuculo luphucule kakhulu ukusebenza kunye nokuthembeka kwe-sunscreens.
Izihluzi ze-UVA zendalo:
Kwiminyaka yakutshanje, izihluzi ze-UVA eziphilayo ziye zaduma ngenxa yokhuseleko lwazo olubalaseleyo lwe-UVA kunye nozinzo oluphuculweyo. Iikhompawundi ezifana neMexoryl SX, iMexoryl XL, kunye neTinosorb S ziye zaguqula izikhuseli zelanga, zibonelela ngokhuseleko oluphezulu lwe-UVA. Ezi zithako ziye zaba yinxalenye ebalulekileyo yeendlela zanamhlanje zokukhusela ilanga.
Iindlela ezintsha zoKwakha:
Kunye nophuhliso lwezithako, iindlela ezintsha zokwenza izinto zidlale indima ebalulekileyo ekuphuculeni ukusebenza kwe-sunscreens zamakhemikhali. I-nanotechnology ivule indlela yee-micronized particles, inikezela ngokugubungela okucacileyo kunye nokufunxwa kwe-UV okuphuculweyo. Itekhnoloji ye-encapsulation ikwasetyenziswe ukuphucula uzinzo kunye nokwenza ngcono ukuhanjiswa kwezithako, ukuqinisekisa ukusebenza okuphezulu.
Izinto eziqwalaselwayo kwiMithetho:
Ngokuqonda okukhulayo ngempembelelo yezithako ze-sunscreen kwimpilo yabantu nakwindalo esingqongileyo, imibutho elawulayo isebenzise izikhokelo kunye nemiqathango. Izithako ezifana ne-oxybenzone kunye ne-octinoxate, ezaziwa ngempembelelo yazo kwindalo esingqongileyo, ziye zakhuthaza eli shishini ukuba liphuhlise ezinye iindlela, libeka phambili ukhuseleko kunye nokuzinza.
Isiphelo:
Uphuhliso lwezithako kwi-sunscreens zamakhemikhali lutshintshe indlela ezikhusela ngayo ilanga kwishishini lezinto zokuthambisa. Ukususela kwiifilitha zokuqala ze-organic ukuya kuphuhliso lokhuselo oluphambili lwe-UVA kunye neendlela ezintsha zokwenza izinto, eli shishini lenze inkqubela phambili ebalulekileyo. Uphando oluqhubekayo kunye nophuhliso luya kuqhuba ukudalwa kweemveliso ze-sunscreen ezikhuselekileyo, ezisebenzayo ngakumbi, nezinobuhlobo nokusingqongileyo, ukuqinisekisa ukhuseleko olufanelekileyo lwelanga kubathengi.
Ixesha leposi: Matshi-20-2024