Kwiminyaka yeshumi elidlulileyo imfuneko yokukhuselwa okuphuculweyoyanda ngokukhawuleza.
Imitha ye-UV inefuthe elibi, kubandakanya ilanga, ifoto-ukuguga kunye nomhlaza wolusu. Ezi mpembelelo zinokuthintelwa kuphela kukukhusela ngokuchasene noluhlu lonke lwemitha ye-UV, kubandakanya i-UVA.
Kwelinye icala kukho nendlela yokunciphisa umda "weekhemikhali" kulusu. Oku kuthetha ukuba i-UV efanelekileyo kakhuluiriberkufuneka ibekhona kwimfuno entsha yokhuseleko olubanzi lwe-UV.Ilanga eliLathe-BMTZ. Yifoto-esizinzileyo, inyibiliki yeoyile, isebenza kakhulu kwaye igubungela i-UVB kunye ne-UVA. Ngonyaka ka-2000, abasemagunyeni e-Europe e-Bis-Seyylhexloxyll Triazine ukuya kuluhlu oluqinisekileyo lwe-cosmetic uv.
•Uva:Amaqela amabini angama-Ortho-oh afunekayo ukuze kusetyenziswe amandla ngokufanelekileyo kwi-Intdromoleulatur Bridges. Ukuze ufumane i-UVA eyomeleleyo kwi-UVA, izikhundla ze-phenyl ezimbini ze-phenyl kufuneka zifakwe endaweni ye-O-alkyl, ezikhokelela kwi-bis-resorcinyl chromopher.
•Uvb:Iqela elisele le-phenyl eliqhotyoshelwe kwi-triazine likhokelela kwi-UVB. Ingabonisa ukuba i-Maximal "I-Spectrum epheleleyo" ifezekisiwe nge-o-alkyl ekwimeko yesikhundla. Ngaphandle kokuthambisa izilwanyana, hipts phantse i-phantse i-oilsmetic zeoyile. Babonisa iipropathi eziqhelekileyo ze-pigments (umzekelo, amanqaku aphezulu anyibilikayo). Ukwenzela ukonyusa ukuswela izilwanyana kwizigaba zeoyile, ubume befilitha ye-UV buguqulwe ngokufanelekileyo.
Izibonelelo:
Ikhuselo elibanzi
Ngokuthelekiswa kakhulu nezinye iifilitha ze-UV
Uzinzo lwefomula
IXESHA LOKUQALA: NgoFebwe-18 ukuya kwi-1822