Sunscreen txheej txheem ntau lawm

Cov txheej txheem ntau lawm ntawmtshuaj pleev thaiv hnubkoom nrog ntau cov kauj ruam, suav nrog kev xaiv raw khoom, sib tov, ntxiv UV inhibitors, colouring, bottling, thiab lwm yam.

Ua ntej, thawj kauj ruam hauv kev uatshuaj pleev thaiv hnubyog xaiv cov khoom siv raw. Cov txheej txheem no suav nrog xaiv ntau yam khoom siv raw xws li cov tshuaj pleev thaiv hnub absorbed heev, cov qauv tsim uas txhawb nqa kev nqus, emulsifiers thiab emollients kom tswj tau qhov zoo tshaj plaws tiv thaiv UV. Tom ntej no, cov khoom siv raw uas tau xaiv yog sib xyaw thiab hauv av los tsim ib qho kev daws teeb meem los xyuas kom meej tias txhua cov khoom siv raw tuaj yeem ua kom tag nrho dissipated thiab absorbed rau hauv cov tshuaj, yog li ua tiav cov txiaj ntsig zoo tiv thaiv UV. UV inhibitors tom qab ntawd ntxiv rau cov tshuaj sib xyaw, thiab cov kauj ruam no ua rau cov tshuaj pleev thaiv hnub muaj UV tiv thaiv. Tom qab ntawd, cov tshuaj pleev thaiv hnub yuav muab xim thiab cov xim uas tsim nyog yuav muab ntxiv kom nws zoo nkauj thiab ntxim nyiam. Cov kauj ruam kawg yog muab cov tshuaj pleev thaiv hnub rau hauv lub thawv tsim nyog. Muaj ntau ntau hom ntim rau xaiv los ntawm, nrog rau cov crayons, tshuaj pleev, qhov ncauj qhov ntswg, thiab lub raj mis.cov

Tsis tas li ntawd, cov txheej txheem ntau lawm ntawmtshuaj pleev thaiv hnubkuj suav nrog kev siv cov ntaub ntawv yooj yim xws li talc, yaj rog, beeswax thiab hydrolyzed whey. Talc yog siv los tiv thaiv lub hnub, cua sov thiab cov pa phem hauv huab cua; yaj rog muab moisturizing thiab lubrication; beeswax muaj cov nyhuv antiseptic; hydrolyzed whey pab talc rau impregnate thiab extract tshuaj. Thaum lub sij hawm tsim cov txheej txheem, cov ntaub ntawv no yuav sib tov, rhuab kom txog thaum lub talc yog tag melted, ntxiv rau boiling kua zaub nyob rau sab saum toj ntawm cov roj kub, thiab ces cov dej-soluble cov khoom xyaw yuav tsum tau ntxiv nyob rau hauv lem, thiab ces txias roj yuav. muab nchuav rau hauv kom sib tov thiab sib tov, thiab thaum kawg zaub roj thiab kho cov khoom xyaw yuav ntxiv thiab sib tov sib npaug.cov

Kev tswj kom zoo thiab kev kuaj xyuas kuj tseem ceeb heev hauv cov txheej txheem tsim khoom. Qhov no suav nrog kev coj mus kuaj los ntawm ntau qhov chaw ntawm cov kab ntau lawm thiab kuaj cov qauv raws li cov qauv thiab cov txheej txheem los xyuas kom meej qhov kev nyab xeeb thiab kev ua tau zoo ntawm cov tshuaj pleev thaiv hnub.