PH cala. Indlela ukukhetha indlela ngokungqinelana eseleyo acid-base?

amaxesha Ngokuqinisekileyo amaninzi weva ingqiqo ezifana pH (cala, asidi okanye ialakalin). It ngumlinganiselo hydrogen kwaye ingafunyanwa zombini kwi ityhubhu kunye cream, kwaye ulwamkelo kwi wesikhumba. Ulwazi malunga pH ulusu ibaluleke kakhulu. Yintoni na le mzobo? Zama ukuqonda.

A kangako isakhiwo isikhumba

Njengoko yaziwa, umaleko horny iye ibekwe sangaphandle eluswini, lenza umsebenzi yokhuseleko. Kuyinto ngamanzi-lipid matrix sithako ezityebileyo ingubo asidi Markionini. Abantu abaninzi bakholelwa ukuba pH - malunga ne-7, kodwa oku elahlekisayo. Izigqubuthelo ne ixabiso pH iya kuba omile kwaye oneengxaki. Isikhumba ubunjwe lactic kunye citric organic acid, yaye ngenxa yoko, kodwa eseleyo lawo ukuya ngaphaya muncu. Ukuba dermis kukho naziphi na ukunyhashwa okanye litshintsha pH sangaphandle iqala ukutshintsha ngesiquphe. Oku kunokuba ngenxa yokugula, kwaye ngenxa zolusu engafanelekanga.

Isikali pH

Into yokuqala ukukhumbula ukuba umba «pH" kusebenza ngokukodwa imeko umbuzo. Ngokuphathelele isikhumba ixabiso yi 5,2-5,7, iinyembezi - 7.4, yaye izisombululo yemichiza cala ixabiso pH - iiyunithi-7 (umz, amanzi).

Siyazi evela iiklasi yemichiza isikali eseleyo acid-base yahluka ukusuka 0 ukuya 14. pH olungathath'icala - malunga nesiqingatha nto, nantoni ngezantsi - na asidi, ngasentla - obrak. Ke ukuba imiba cosmetology, le «pH-cala" kuthetha ukuba loo Isalathisi acid-siseko yeyona ilungileyo kuzo zonke iintlobo ulusu.

Ukongeza, ulusu olunamafutha njengoko okubangelwe yile salathisi. isikhumba ene-pH value ukusuka 5.7 7 yesiqhelo - ukususela 5.2 ukuya 5.7, olunamafutha - 4 ukuya 5.2.

iingxaki Skin: umjikelezo

Sele Wababela nesibakala sokuba pH, kodwa ngoku makhe sithethe ngeengxaki ezinxulumene nale salathisi. ulusu olunamafutha - ingxaki abantu abaninzi. Ingakumbi elivisayo. Phantse wonke umntwana kuya kuvela nakanjani izinduna. Kakade ke, oku ngenxa yokusilela nemvelaphi hormone okwethutyana. Nangona kunjalo, ngeli xesha kubaluleke kakhulu zolusu echanekileyo.

Yintoni abazali kwimeko enjalo? Amaxesha amaninzi uhlambe? Le elivisayo wenza oko, kodwa amaqhakuva kukufumana ezinkulu kuphela. Yintoni na isizathu? Isepha - kuthetha ukuba ukusabela obrak, kunye pH yayo iyahluka ukusuka iiyunithi-6 ukuya kwi-11. Ukusebenzisa kwakhe rhoqo kukhokelela yokuba iyadilika umaleko phezulu ubuso kunye asidi medium. Umsebenzi sokhuselo corneum ezinawo esebenza ukuze encinane isikhumba iintsholongwane yezimbiwa acid abakhoyo iintyatyambo eqhelekileyo umntu, kokukhona uvelisa ngamanqatha ongama. Nantso into eqhubekayo: kokukhona sihlambe ngokwethu, isikhumba zhirneet ngakumbi. Umbuzo yendalo kuvela: "Yintoni esinokuyenza?"

Indlela ukugcina pH eqhelekileyo?

Ukuze ukugcina ubuso xa uhlamba yendalo imali yayo esiti-obrak, kufuneka sinikele ingqalelo ngokukhethekileyo iimveliso izithambiso, ezisetyenziswa kule nkqubo. Inyathelo lokuqala elibalulekileyo kukufumanisa ukuba isepha kunye pH ingasetyenziswa ukuhlamba rhoqo. Ukuba oku ngokwenene njengenyathelo kuyimfuneko, isiseko hydrogen kufuneka nakanjani babe asidi (iiyunithi 5.5). Ezi ziquka amagwebu ezizodwa, ijel, ogutyula umzimba, cleanser Ulusu ngenxa olunamafutha (pH = 4).

Ukuba akukho ngxaki hlobo, oku kusetyenziswa arhente lwempilo asidi, iiyunithi 5.5 ulusu owomileyo - kufutshane cala - 6.5. Xa kunjalo kubalulekile ukukhumbula ukuba ukuze ukhethe iyeza ekunene ukunakekelwa isikhumba, kufuneka malunga lilingane intsalela asidi-obrak. Kukwasebenza kwanjalo kuyo imali eseleyo ukuba ulusu. Gel nge pH cala, njengoko umgaqo, efanelekileyo ulusu owomileyo, nangenxa ingxaki kukuba ukhethe imali nge-bume asidi kancinane.

Ngeshampu pH amazinga

Njengayo nayiphi na into, ishampu naye abe pH, kunye lophawu nganye, yinto eyahlukileyo. Apha, ngokunxulumene nemithetho of chemistry, wenza kanye loo mgaqo: ezantsi kwiiyunithi 7 - le asidi, ngasentla - obrak. Ishampu with pH - kanye iiyunithi 7. Ngokwentelekiso ukhakhayi phantse yonke into kuhlala ingatshintshanga. Ngesiqhelo waba okwanamhlanje asidi medium - 4.5-5.5. Oku kuthetha ukuba ukukhetha ngeshampu axhomekeke ngokupheleleyo indlela entlonzeni othambekele ngamanqatha.

Kuba uhlobo owomileyo Kucetyiswa ukuba basebenzise ngeshampu obrak ngakumbi kutyetyiswa kunye - asidi nje kancinane. Ukuba nepriveredlivyh entlonzeni, afana nabantwana, kuyimfuneko ukuba ukukhetha ishampu pH (iiyunithi 7). Ngelishwa, kuphela inani elincinane abenzi zibonisa oko ngesalathisi acid-isiseko ekhoyo kwiimveliso zabo Skin. Bona umda kuphela imibhalo (for owomileyo olunamafutha, ulusu, oqhelekileyo). Le nto ilungile ngokupheleleyo, ngenxa yokuba, ngokutsho izifundo, kubonakala ukuba, njengokuba umthetho, ishampu ngenxa ialakalin ulusu eqhelekileyo, kwaye kufuneka asidi kancinane.

Ngaba kunokwenzeka ukuba ukuqinisekisa inqanaba pH ulusu kunye indlela?

Abaninzi ungathanda ukufunda amanzi kunye nokulungelelana acid kumcimbi othile. Ekhaya, wenze uvavanyo ayikho nzima. Oku kufuna isisombululo kunye sisalathisi asidi-base, njengoko umthetho, litmus strip. Bona lifakwe isisombululo sibekwe iphepha elimhlophe. Phantse nangoko, isiboniso iboniswe ngombala. Phantsi isikali umbala olucetywayo, kunokwenzeka ukuba ukumisela okusingqongileyo asidi okanye ialakalin. Umzekelo, ukuba litmus nkxu e ngesepha, ngoko ke uya kumnika umbala oluhlaza kwimeko asidi - ebomvu.

Enye indlela yokufumana phandle ukuba yintoni i-pH, - le-pH imitha. Esi sisixhobo imfuno iphezulu kakhulu ngokuzimisela ngokuchanileyo eliphezulu. Lusetyenziswa mveliso apho kufuneka ulawulo lokusingqongileyo (kushishino lwemveliso amafutha, amachiza kunye nepeyinti, kunye nabanye.). Esi sixhobo ikwafunyanwa kwi ulwamkelo kwi wesikhumba. Kweli nqaku, siye safumanisa ukuba le pH oko, yabona ukuba ukhethe indlela zokuthambisa ekunene kukhathalelo ulusu njengako ukulinganisela asidi-obrak.