Kev ua tau zoo ntawm cov khoom siv ntawm lub ntsej muag ntawm lub ntsej muag yog nyob ntawm qhov kev xaiv meej thiab cov qauv kev tshawb fawb ntawm cov khoom xyaw. Cov tawv nqaij ntawm lub ntsej muag muaj cov qauv muag, lub teeb meem tsis yooj yim, thiab raug ncaj qha rau sab nraud stimuli, yuav tsum muaj qhov sib npaug ntawm kev ua siab mos, nkag mus, thiab ua haujlwm zoo hauv nws cov qauv. Cov khoom xyaw tseem ceeb tuaj yeem raug cais los ntawm kev ua haujlwm rau hauv lub hauv paus matrix, cov khoom xyaw nquag, thiab kev txhawb nqa kom ruaj khov, sib sau ua lub hauv paus ntawm ntau- kev tu tawv nqaij.
Lub hauv paus matrix ua lub luag haujlwm rau cov khoom tsim thiab kev ntxhib los mos, feem ntau muaj cov theem aqueous, roj theem, thiab emulsification system. Cov theem aqueous feem ntau siv cov dej deionized los yog dej paj los ua lub hauv paus, lub luag haujlwm rau cov dej soluble -cov khoom siv soluble thiab xa cov khoom xyaw. Cov roj theem feem ntau suav nrog cov roj ntxhia, cov roj cog, thiab cov esters hluavtaws, siv los moisturize thiab soften ntawm daim tawv nqaij thiab tsim cov dej- kaw zaj duab xis. Emulsifiers txo qhov kev sib tshuam ntawm cov roj thiab dej, tsim cov emulsion ruaj khov lossis qab zib qauv, txiav txim siab cov khoom sib kis thiab ua raws li daim tawv nqaij.
Cov khoom xyaw nquag yog lub hauv paus ntawm kev ua tiav cov hom phiaj ntawm kev tu tawv nqaij. Moisturizing khoom feem ntau muaj hyaluronic acid, glycerin, ceramides, thiab ntuj moisturizing yam, uas tuaj yeem nqus tau thiab kaw hauv cov dej noo, ntxiv dag zog rau stratum corneum barrier. Kev kho cov khoom siv feem ntau yog siv panthenol, asiaticoside, thiab beta -glucan los txo qhov liab thiab stinging thiab txhawb cov ntaub so ntswg rov qab. Brightening khoom feem ntau muaj niacinamide, tranexamic acid, vitamin C, thiab lawv cov derivatives, uas muaj peev xwm inhibit melanin thauj thiab lighten pigmentation. Anti- cov khoom laus yog raws li peptides, retinol thiab nws cov derivatives, coenzyme Q10, thiab ntau yam nroj tsuag antioxidants, uas tuaj yeem txhawb nqa collagen synthesis, neutralize dawb radicals, thiab ncua kev sib sib zog nqus ntawm wrinkles. Cov tshuaj pleev thaiv hnub tso siab rau lub hnub ci thaiv lub cev (xws li titanium dioxide thiab zinc oxide) lossis cov tshuaj lim dej los thaiv UV puas rau ntawm daim tawv nqaij.
Kev txhawb nqa kev ruaj ntseg muaj xws li cov tshuaj tua kab mob, pH adjusters, chelating agents, thiab fragrances. Preservatives yog qhov tseem ceeb rau kev ruaj ntseg microbial ntawm cov khoom. Novel polyol thiab organic acid preservative systems yog dav siv vim lawv superior softness. pH adjusters xyuas kom cov formulation ib puag ncig zoo ib yam li cov tawv nqaij acidic lub xeev me ntsis, txhawb lub stability ntawm active cov khoom xyaw thiab ib tug noj qab haus huv daim tawv nqaij barrier. Chelating agents tuaj yeem chelate hlau ions hauv dej, tiv thaiv cov khoom oxidation. Cov tshuaj tsw qab yog siv los txhim kho cov neeg siv kev paub dhau los, tab sis feem ntau raug tshem tawm lossis kom lawv cov concentration txo qis hauv cov qauv rau cov tawv nqaij rhiab heev.
Zuag qhia tag nrho, cov khoom tseem ceeb ntawm cov khoom siv ntawm lub ntsej muag yog ua raws li cov yam ntxwv ntawm daim tawv nqaij. Los ntawm kev txhawb nqa ruaj khov ntawm lub hauv paus matrix, lub hom phiaj ntawm cov khoom xyaw nquag, thiab kev lees paub zoo ntawm cov cuab yeej pabcuam, kev tshawb fawb, kev sib koom ua ke, thiab cov qauv tsim kom muaj tseeb, muab kev saib xyuas zoo thiab zoo rau ntau hom tawv nqaij thiab kev xav tau. Qhov no tseem qhia txog kev lag luam tus qauv rau kev tshwj xeeb hauv kev tshawb fawb thiab kev siv.
