Lub hnub qub ntawm kev saib xyuas kom zoo txij li thaum ntxov 2000s, Brazilian straightening muaj ntau cov thwjtim nrog cov plaub hau ntxeev siab. Yog hais tias nws cov kev qhuab qhia yog bluffing, peb tam sim no paub tias qhov kev kho mob no tsis muaj teeb meem kiag li ... Nws muaj dab tsi? Dab tsi yog qhov txaus ntshai rau cov plaub hau tab sis kuj rau kev noj qab haus huv?

Brazilian straightening yog cov txheej txheem kev tu plaub hau, uas raws li nws lub npe qhia los ntawm Brazil. Kuj tseem hu ua keratin smoothing, nws muaj kev txhaj tshuaj raws li cov keratin concentrated hauv cov plaub hau, tom qab tau qhib cov nplai. Tom qab ntawd, cov nplai no raug kaw thaum lub sij hawm smoothing kauj ruam nrog cov cua sov phaj. Cov keratin siv hauv Brazilian smoothing tuaj yeem tau txais los ntawm cov protein ntawm cov zaub hauv paus (soybean lossis nplej) lossis tsiaj (los ntawm plaub, horns, hooves). , cov plaub hau ntawm ntau yam tsiaj). Tom qab qhov kev kho mob no, cov plaub hau yog ob qho tib si smoother tab sis kuj hloov tau yooj yim dua, shinier, muaj zog thiab ntau dua kev qhuab qhia, yog li nws txoj kev vam meej.

Brazilian straightening yuav siv sij hawm qhov chaw nyob rau hauv 3 kauj ruam:

• Cov kauj ruam kawg: cov plaub hau yog straightened strand los ntawm strand siv cua sov daim hlau ntawm 230 ° C, uas kuj ua rau nws muaj peev xwm kaw cov nplai thiab cov plaub hau. Qhov kev kho no tuaj yeem nyob nruab nrab ntawm 2: 30 thiab 5 teev nyob ntawm qhov tuab thiab ntev ntawm cov plaub hau;
• Ua ntej ntawm tag nrho cov, cov plaub hau yog ua tib zoo ntxuav nrog ib tug thiaj li hu ua clarifying tsuaj zawv plaub hau, nyob rau hauv lub pH yooj yim, uas qhib lub teev nyob rau hauv thiaj li yuav npaj nws kom tau txais kev kho mob keratin;
• Tom qab ntawd, cov khoom smoothing yog siv rau cov plaub hau ntub dej, strand los ntawm strand, tsis txhob kov cov hauv paus hniav thiab faib uniformly tshaj tag nrho ntev ntawm cov plaub hau. Cov khoom yuav tsum zaum thiab ua rau ¼ ntawm ib teev nyob rau hauv lub cua sov lub hau, ua ntej ziab cov plaub hau.

Cov khoom siv rau Brazilian straightening muaj - ntxiv rau cov keratin uas ua rau nws muaj kev vam meej - formalin, los yog formaldehyde. Nws yog nws uas yog lub luag hauj lwm rau smoothing nyhuv ntawm kev kho mob tab sis nws kuj yog nws uas arouses controversy. Formalin tuaj yeem ua rau lub sijhawm ntev ua rau muaj kev hloov pauv ntawm cov plaub hau thiab ua rau cov plaub hau poob.

Lwm qhov kev txhawj xeeb: cov kauj ruam kawg, uas muaj kev ncaj cov plaub hau nrog cov cua kub uas ncav cuag qhov kub ntawm 230 degrees Celsius, tuaj yeem ua rau cov plaub hau tsis zoo, tsis muaj zog, xim lossis cov plaub hau bleached.

Ntxiv mus, nyob ntawm cov khw txiav plaub hau, cov sib tov siv hauv Brazilian straightening tej zaum yuav muaj silicone thiab / los yog paraffin. Ob qho tshuaj occlusive no muab cov plaub hau tsis zoo rau kev noj qab haus huv, tab sis hauv kev xyaum ua rau nws ua pa thiab txo nws qhov ci.

Thaum kawg, tom qab Brazilian straightening, nws yog ib qho tseem ceeb uas yuav tsum tau siv cov tshuaj zawv plaub hau tsis muaj sulfate kom lav lub neej ntev ntawm cov smoothing, tab sis kuj thiab saum toj no tag nrho los khaws cov plaub hau zoo.

Teeb meem: yog tias qhov kev kho mob tom qab no tsis raug saib xyuas - uas feem ntau tshwm sim vim cov khoom no tsis tshua muaj tab sis kuj kim dua - qhov kev pheej hmoo yog ua rau cov plaub hau tsis muaj zog ntxiv uas yuav ua rau nkig, ziab thiab poob ntau dua.

Dhau li ntawm qhov teeb meem ntawm kev rov ua dua Brazilian ncaj ntawm cov plaub hau zoo, lwm qhov tseem ceeb dua: cov teebmeem ntawm formaldehyde rau kev noj qab haus huv.

Cov formalin muaj nyob rau hauv Brazilian straightening cov khoom tau muab cais txij li thaum 2005 los ntawm WHO raws li ib tug carcinogenic thiab txaus ntshai tshuaj. Raws li Lub Chaw Haujlwm Saib Xyuas Kev Noj Qab Haus Huv Brazilian (ANVISA), cov kev pheej hmoo cuam tshuam nrog kev siv cov formalin yog qhov tiag tiag thiab tuaj yeem muaj los ntawm kev ua xua ntawm daim tawv nqaij, mus rau kev ua pa tsis zoo los ntawm kev pheej hmoo ntawm mob qog noj ntshav hauv cov neeg mob. cov kws txiav plaub hau ntawm kev nthuav qhia. Rau cov laj thawj no, keratin siv rau smoothing yuav tsum tsis txhob 0,2% formaldehyde.

Hauv kev xyaum, tus nqi no feem ntau tsis hwm thiab qee cov khoom muaj ntau ntau.

Ib txoj kev tshawb fawb German tau ua nyob rau xyoo 2013 tshwj xeeb tau txheeb xyuas ntau cov khoom lag luam Brazilian straightening, thiab qhia tias feem ntau ntawm lawv muaj formaldehyde cov ntsiab lus ntawm qhov nruab nrab 1,46% thiab txog li 5,83%! Cov nqi ntau dua li cov lus pom zoo rau kev noj qab haus huv.

Vim yog formalin nws muaj, feem ntau nyob rau hauv ntau tshaj ntawm European qauv, Brazilian smoothing yog ib qho kev poob siab rau cov poj niam cev xeeb tub. Qhov no carcinogenic tshuaj yog tiag tiag xav tias, nyob rau hauv ntau koob, ua rau fetal malformations.

Tsis muaj Brazilian smoothing rau cov me nyuam ib yam, uas nws tsis paub tab ua pa system ua rau lawv rhiab heev rau cov tshuaj lom.

Cov neeg uas muaj mob hawb pob thiab ua xua yuav tsum zam cov kev kho mob no tsis tu ncua.