美白化妆品的素材.pdf

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时间:2020-03-26

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1、미백화장품의소재Skinwhitening재약공학•20082321•조량kinwhitening,skinlighteningandskinbleachingreferstothepracticeofusingchemicalsubstancesinanattempttolightenskintoneorprovideanevenskincomplexionbylessentheconcentrationofmelanin.Severalchemicalshavebeenshowntobeeffectiveinskinwhitening.

2、UsesSpecificzonesofabnormallyhighpigmentationsuchasmolesandbirthmarksmaybedepigmentedtomatchtothesurroundingskin.Conversely,incasesofvitiligo,unaffectedskinmaybelightenedtoachieveamoreuniformappearance.However,incaseswherethesespottreatmentcreamsareusedinattempttolightenth

3、eentirecomplexion,allofthecurrentmethodsareconsideredineffective.Completeskindepigmentationissimplyafutileprocess.Anadditionalapplicationisgenitaloranalbleaching,intendedtoreducethetypicallydarkerpigmentationofthegenitalandperianalarea.Longtermuseofskinwhitenerscanleadtopi

4、gmentationincreasingtothejointsofthefingers,toes,buttocksandears.Theskinofthefacecanbecomethinnedandtheareaaroundtheeyescanhaveincreasedpigmentationcausinga'bleachpandaeffect'.CombinationtreatmentsMostskin-lighteningtreatments,whichcanreduceorblocksomeamountofmelaninproduc

5、tion,areaimedatinhibitingtyrosinase.Manytreatmentsuseacombinationoftopicallotionsorgelscontainingmelanin-inhibitingingredientsalongwithasunscreen,andaprescriptionretinoid.Dependingonhowtheskinrespondstothesetreatments,exfoliants—eitherintheformoftopicalcosmeticorchemicalpe

6、els—andlasersmaybeused.NewdevelopmentusingLEDsystemsarealsoshowinggoodresults.HomemadetreatmentsManypeopletheworldoverusehomemadetreatmentsforawhiterskin,ratherthanbuycommercialskinlighteners.Thesehomemadetreatmentsincludeextractsoflemonjuice,milk,lime,licoriceandotherherb

7、s.MercuryManyskinwhitenerscontaintoxicmercurysuchasmercury(II)chlorideorammoniatedmercuryastheactiveingredient.Howevermercuryhasbeenbannedinmostcountries(Europe1976)(USA1990)foruseinskinwhiteningbecauseitaccumulatesonskinanditcanhavetheoppositeresultsinthelongterm.Somestud

8、iessuggestthatlong-termusecouldcausesystemicabsorptionthatleadstotissueaccumulationofthes

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《美白化妆品的素材.pdf》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库

1、미백화장품의소재Skinwhitening재약공학•20082321•조량kinwhitening,skinlighteningandskinbleachingreferstothepracticeofusingchemicalsubstancesinanattempttolightenskintoneorprovideanevenskincomplexionbylessentheconcentrationofmelanin.Severalchemicalshavebeenshowntobeeffectiveinskinwhitening.

2、UsesSpecificzonesofabnormallyhighpigmentationsuchasmolesandbirthmarksmaybedepigmentedtomatchtothesurroundingskin.Conversely,incasesofvitiligo,unaffectedskinmaybelightenedtoachieveamoreuniformappearance.However,incaseswherethesespottreatmentcreamsareusedinattempttolightenth

3、eentirecomplexion,allofthecurrentmethodsareconsideredineffective.Completeskindepigmentationissimplyafutileprocess.Anadditionalapplicationisgenitaloranalbleaching,intendedtoreducethetypicallydarkerpigmentationofthegenitalandperianalarea.Longtermuseofskinwhitenerscanleadtopi

4、gmentationincreasingtothejointsofthefingers,toes,buttocksandears.Theskinofthefacecanbecomethinnedandtheareaaroundtheeyescanhaveincreasedpigmentationcausinga'bleachpandaeffect'.CombinationtreatmentsMostskin-lighteningtreatments,whichcanreduceorblocksomeamountofmelaninproduc

5、tion,areaimedatinhibitingtyrosinase.Manytreatmentsuseacombinationoftopicallotionsorgelscontainingmelanin-inhibitingingredientsalongwithasunscreen,andaprescriptionretinoid.Dependingonhowtheskinrespondstothesetreatments,exfoliants—eitherintheformoftopicalcosmeticorchemicalpe

6、els—andlasersmaybeused.NewdevelopmentusingLEDsystemsarealsoshowinggoodresults.HomemadetreatmentsManypeopletheworldoverusehomemadetreatmentsforawhiterskin,ratherthanbuycommercialskinlighteners.Thesehomemadetreatmentsincludeextractsoflemonjuice,milk,lime,licoriceandotherherb

7、s.MercuryManyskinwhitenerscontaintoxicmercurysuchasmercury(II)chlorideorammoniatedmercuryastheactiveingredient.Howevermercuryhasbeenbannedinmostcountries(Europe1976)(USA1990)foruseinskinwhiteningbecauseitaccumulatesonskinanditcanhavetheoppositeresultsinthelongterm.Somestud

8、iessuggestthatlong-termusecouldcausesystemicabsorptionthatleadstotissueaccumulationofthes

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