Ibitanda byo gusiga ibara ry'uruhu bikoresha amatara yihariye atanga urumuriurumuri rwa ultraviolet (UV), bitera uruhu gukora melanin — ibara rituma habaho ibara ry’umuhondo. Ubwoko bw’ingenzi bw’urumuri rwa UV rukoreshwa muri ibi ni:
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Imirasire ya UVA (315–400 nm):
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Ibi byinjira cyane mu ruhu.
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Ishinzwe ingaruka nyinshi z'izuba ryihuse.
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Kugaragara cyane bishobora gutera gusaza k'uruhu imburagihe no kongera ibyago byo kurwara kanseri y'uruhu.
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Imirasire ya UVB (280–315 nm):
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Bigira ingaruka ku gice cyo hanze cy'uruhu.
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Fasha gukora ibara ry'umuhondo rimara igihe kirekire binyuze mu gutuma habaho ikorwa rya melanin.
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Kugaragara cyane bishobora gutera ubushyuhe bw'izuba no kwangiza uruhu.
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Igipimo cy'imirasire ya UV mu buriri bwo gukaraba:
Uburiri bwinshi bwo gusiga ibara ry'uruhu bugezweho bukoresha uruvange rwa hafi95% bya UVA na 5% bya UVB, nubwo igipimo nyacyo gishobora gutandukana bitewe n'imiterere y'igitanda n'amabwiriza yo mu gace utuyemo.
Inama z'umutekano:
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Buri gihe kurikiza igihe cyo gushyiramo ibintu cyatanzwe n'uwakoze.
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Ambara imyenda irinda amaso kugira ngo wirinde kwangirika kw'amaso bitewe n'imirasire y'izuba.
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Irinde koroshya uruhu rwawe niba ufite uruhu rworoshye cyangwa wararwaye kanseri y'uruhu.
Umurongo w'ingenzi:
Uburiri bwo gusiga ibara ry'uruhu bukoresha urumuri rwa UVA na UVB kugira ngo butume uruhu ruhinduka ibara ry'uruhu, ariko ubwoko bwombi bushobora kwangiza uruhu rwawe mu gihe rudakoreshejwe neza. Kurinda no kwirinda ni ingenzi kugira ngo ukoreshe neza.
