[et_pb_section fb_built=“1″ admin_label=“section“ _builder_version=“4.16″ global_colors_info=“{}“ theme_builder_area=“post_content“][et_pb_row admin_label=“row“ _builder_version=“4.16″ background_size=“initial“ background_position=“top_left“ background_repeat=“repeat“ global_colors_info=“{}“ theme_builder_area=“post_content“][et_pb_column type=“4_4″ _builder_version=“4.16″ custom_padding=“|||“ global_colors_info=“{}“ custom_padding__hover=“|||“ theme_builder_area=“post_content“][et_pb_text _builder_version=“4.23″ _module_preset=“default“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n
Na f\u013ea\u0161ti\u010dke ho v\u00e4\u010d\u0161inou nen\u00e1jdete, napriek tomu m\u00f4\u017ee ovplyvni\u0165, ako sa bude v\u00fdrobok na poko\u017eke spr\u00e1va\u0165, \u010di ju nebude zbyto\u010dne dr\u00e1\u017edi\u0165 a \u010di bud\u00fa spr\u00e1vne fungova\u0165 niektor\u00e9 akt\u00edvne l\u00e1tky alebo konzerva\u010dn\u00e9 l\u00e1tky.<\/p>\n
Pri hotovej kozmetike to za n\u00e1s rie\u0161i v\u00fdrobca. Ke\u010f v\u0161ak doma vyr\u00e1bame vlastn\u00e9 tonikum, s\u00e9rum alebo kr\u00e9m, pH u\u017e nie je len \u00fadaj z hodiny ch\u00e9mie. Je s\u00fa\u010das\u0165ou recept\u00fary.<\/p>\n
[\/et_pb_text][et_pb_image src=“https:\/\/green-gate.eu\/wp-content\/uploads\/2026\/07\/articlePh.png“ _builder_version=“4.23″ _module_preset=“32fecfd5-025d-42fc-9828-d86bb0da2821″ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″][\/et_pb_image][et_pb_text _builder_version=“4.23″ _module_preset=“71bce9ad-9a5c-4bc0-a49d-5ef17a0a743b“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n
Zdroj: GreenScan<\/p>\n
[\/et_pb_text][et_pb_text _builder_version=“4.23″ _module_preset=“default“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n
Hodnota pH n\u00e1m zjednodu\u0161ene hovor\u00ed, \u010di je vodn\u00fd roztok kysl\u00fd, neutr\u00e1lny alebo z\u00e1sadit\u00fd.<\/p>\n
Hodnoty pod 7 ozna\u010dujeme ako kysl\u00e9, pH 7 ako neutr\u00e1lne a hodnoty nad 7 ako z\u00e1sadit\u00e9. Stupnica je logaritmick\u00e1, tak\u017ee rozdiel medzi pH 5 a pH 6 nie je tak\u00fd mal\u00fd, ako m\u00f4\u017ee na prv\u00fd poh\u013ead vyzera\u0165 [1].<\/p>\n
A pozor na jednu \u010dast\u00fa chybu. Be\u017en\u00e9 pH sa t\u00fdka predov\u0161etk\u00fdm v\u00fdrobkov obsahuj\u00facich vodu. pH sa d\u00e1 be\u017ene mera\u0165 len pri v\u00fdrobkoch, ktor\u00e9 obsahuj\u00fa vodu, preto\u017ee pr\u00e1ve vo vodnom prostred\u00ed sa ur\u010duje kyslos\u0165 alebo z\u00e1saditos\u0165. \u010cist\u00fd olej, maslo alebo bezvod\u00fd balzam preto nemaj\u00fa pH, ktor\u00e9 by sa dalo mera\u0165 rovnako ako pri toniku \u010di s\u00e9re.<\/p>\n
[\/et_pb_text][et_pb_image src=“https:\/\/green-gate.eu\/wp-content\/uploads\/2026\/07\/articlePh4-1.png“ _builder_version=“4.23″ _module_preset=“32fecfd5-025d-42fc-9828-d86bb0da2821″ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″][\/et_pb_image][et_pb_text _builder_version=“4.23″ _module_preset=“71bce9ad-9a5c-4bc0-a49d-5ef17a0a743b“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n
Zdroj: GreenScan<\/p>\n
[\/et_pb_text][et_pb_text _builder_version=“4.23″ _module_preset=“default“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n
Povrch zdravej poko\u017eky nie je neutr\u00e1lny. Je prirodzene mierne kysl\u00fd.<\/p>\n
\u010casto sa stretnete s hodnotou pH 5,5, ale nejde o jedno univerz\u00e1lne \u010d\u00edslo platn\u00e9 pre ka\u017ed\u00e9ho \u010dloveka a ka\u017ed\u00fa \u010das\u0165 tela. V\u00fdsledn\u00e9 pH ovplyv\u0148uje vek, miesto merania, pot, ko\u017en\u00fd maz, kozmetika, um\u00fdvanie aj okolit\u00e9 prostredie.<\/p>\n
V\u00fdskum uk\u00e1zal, \u017ee prirodzen\u00e9 pH povrchu poko\u017eky je v priemere ni\u017e\u0161ie ako 5. Tak\u00e9to prostredie bolo spojen\u00e9 s lep\u0161\u00edmi parametrami ko\u017enej bari\u00e9ry a podmienkami vhodnej\u0161\u00edmi pre prirodzen\u00fa ko\u017en\u00fa mikrofl\u00f3ru [2].<\/p>\n
Toto mierne kysl\u00e9 prostredie sa niekedy ozna\u010duje ako kysl\u00fd ochrann\u00fd pl\u00e1\u0161\u0165. Podie\u013ea sa na fungovan\u00ed enz\u00fdmov v najvrchnej\u0161ej vrstve poko\u017eky, obnove ko\u017enej bari\u00e9ry, spr\u00e1vnom odlu\u010dovan\u00ed odumret\u00fdch buniek a ochrane pred niektor\u00fdmi ne\u017eiaducimi mikroorganizmami [3].<\/p>\n
To v\u0161ak neznamen\u00e1, \u017ee kysl\u00e1 poko\u017eka zlikviduje bakt\u00e9rie ako ocot vodn\u00fd kame\u0148. Ide o jemne nastaven\u00e9 prostredie, v ktorom m\u00f4\u017ee poko\u017eka spr\u00e1vne fungova\u0165.<\/p>\n
Mo\u017eno \u010dak\u00e1te, \u017ee najv\u00e4\u010d\u0161\u00ed probl\u00e9m predstavuje agres\u00edvne mydlo. Len\u017ee pH poko\u017eky m\u00f4\u017ee do\u010dasne zv\u00fd\u0161i\u0165 aj samotn\u00e9 opl\u00e1chnutie vodou.<\/p>\n
\u0160t\u00fadie ukazuj\u00fa, \u017ee po umyt\u00ed m\u00f4\u017ee n\u00e1vrat poko\u017eky k p\u00f4vodn\u00e9mu pH trva\u0165 nieko\u013eko hod\u00edn [2, 4]. To samozrejme neznamen\u00e1, \u017ee by sme sa mali presta\u0165 um\u00fdva\u0165. Poko\u017eka m\u00e1 schopnos\u0165 svoje prostredie op\u00e4\u0165 upravi\u0165.<\/p>\n
Probl\u00e9m m\u00f4\u017ee nasta\u0165 sk\u00f4r pri \u010dastom um\u00fdvan\u00ed, pou\u017e\u00edvan\u00ed silne z\u00e1sadit\u00fdch v\u00fdrobkov alebo nevhodn\u00fdch \u010distiacich l\u00e1tok. Najm\u00e4 ak je poko\u017eka u\u017e such\u00e1, citliv\u00e1 alebo m\u00e1 naru\u0161en\u00fa bari\u00e9ru.<\/p>\n
A d\u00f4le\u017eit\u00fd detail. Jemnos\u0165 \u010distiaceho v\u00fdrobku neur\u010duje len pH. Z\u00e1le\u017e\u00ed aj na druhu a mno\u017estve tenzidov, teda um\u00fdvac\u00edch l\u00e1tok, d\u013a\u017eke kontaktu s poko\u017ekou, teplote vody a frekvencii pou\u017e\u00edvania. Aj dva v\u00fdrobky s rovnak\u00fdm pH sa preto m\u00f4\u017eu na poko\u017eke spr\u00e1va\u0165 \u00faplne inak [4, 5].<\/p>\n
N\u00e1pis \u201epH 5,5\u201c m\u00f4\u017ee znie\u0165 odborne a d\u00f4veryhodne. Neznamen\u00e1 v\u0161ak automaticky, \u017ee je produkt kvalitn\u00fd, jemn\u00fd alebo vhodn\u00fd pr\u00e1ve pre va\u0161u poko\u017eku.<\/p>\n
Kozmetick\u00fd v\u00fdrobok je cel\u00e1 zmes. Z\u00e1le\u017e\u00ed na pou\u017eit\u00fdch l\u00e1tkach, ich koncentr\u00e1cii, kombin\u00e1cii, konzerv\u00e1cii, stabilite aj sp\u00f4sobe pou\u017eitia.<\/p>\n
Rovnako neplat\u00ed, \u017ee ka\u017ed\u00fd kr\u00e9m, tonikum alebo s\u00e9rum mus\u00ed ma\u0165 pH presne 5,5. Vhodn\u00e1 hodnota sa odv\u00edja od \u00fa\u010delu v\u00fdrobku a jeho zlo\u017eenia.<\/p>\n
V\u00fdrobky ur\u010den\u00e9 na be\u017en\u00fa ka\u017edodenn\u00fa starostlivos\u0165 b\u00fdvaj\u00fa \u010dasto mierne kysl\u00e9 a ich pH sa m\u00f4\u017ee pohybova\u0165 pribli\u017ene v oblasti pH poko\u017eky.<\/p>\n
To v\u0161ak neznamen\u00e1, \u017ee tonikum s pH 5,2 je automaticky skvel\u00e9 a tonikum s pH 6 zl\u00e9. pH je len jedna \u010das\u0165 celej sklada\u010dky.<\/p>\n
Tonikum navy\u0161e nemus\u00ed \u201eobnovova\u0165 pH\u201c po ka\u017edom \u010disten\u00ed. Modern\u00e9 jemn\u00e9 \u010distiace v\u00fdrobky m\u00f4\u017eu by\u0165 samy formulovan\u00e9 ako mierne kysl\u00e9. Hlavnou funkciou tonika m\u00f4\u017ee by\u0165 napr\u00edklad hydrat\u00e1cia alebo dodanie konkr\u00e9tnych akt\u00edvnych l\u00e1tok.<\/p>\n
Pri exfolia\u010dn\u00fdch v\u00fdrobkoch s AHA kyselinami z\u00e1le\u017e\u00ed na pH naozaj ve\u013emi. St\u00e1le v\u0161ak nesta\u010d\u00ed pozna\u0165 len jedno \u010d\u00edslo.<\/p>\n
\u00da\u010dinok a riziko podr\u00e1\u017edenia ovplyv\u0148uje druh kyseliny, jej koncentr\u00e1cia, v\u00fdsledn\u00e9 pH, mno\u017estvo vo\u013enej kyseliny, d\u013a\u017eka p\u00f4sobenia aj stav poko\u017eky. S ni\u017e\u0161\u00edm pH m\u00f4\u017ee by\u0165 v\u00e4\u010d\u0161ia \u010das\u0165 kyseliny v akt\u00edvnej forme, z\u00e1rove\u0148 v\u0161ak m\u00f4\u017ee r\u00e1s\u0165 riziko \u0161t\u00edpania, podr\u00e1\u017edenia alebo po\u0161kodenia poko\u017eky.<\/p>\n
Pri kozmetick\u00fdch v\u00fdrobkoch s AHA kyselinami na dom\u00e1ce pou\u017eitie sa v odbornej literat\u00fare \u010dasto uv\u00e1dza maxim\u00e1lna koncentr\u00e1cia 10 % a v\u00fdsledn\u00e9 pH aspo\u0148 3,5 [6]. Nejde v\u0161ak o n\u00e1vod, \u017ee doma sta\u010d\u00ed namie\u0161a\u0165 desa\u0165percentn\u00fa kyselinu a upravi\u0165 pH na 3,5. Bezpe\u010dnos\u0165 z\u00e1vis\u00ed od celej recept\u00fary.<\/p>\n
Siln\u00e9 dom\u00e1ce kyselinov\u00e9 peelingy preto nie s\u00fa dobr\u00fd DIY experiment.<\/p>\n
[\/et_pb_text][et_pb_image src=“https:\/\/green-gate.eu\/wp-content\/uploads\/2026\/07\/articlePh2.png“ _builder_version=“4.23″ _module_preset=“32fecfd5-025d-42fc-9828-d86bb0da2821″ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″][\/et_pb_image][et_pb_text _builder_version=“4.23″ _module_preset=“71bce9ad-9a5c-4bc0-a49d-5ef17a0a743b“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n
Zdroj: GreenScan<\/p>\n
[\/et_pb_text][et_pb_text _builder_version=“4.23″ _module_preset=“default“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n
Ani pri vitam\u00edne C nesta\u010d\u00ed pre\u010d\u00edta\u0165 si n\u00e1pis na prednej strane obalu. Existuje nieko\u013eko r\u00f4znych foriem vitam\u00ednu C a ka\u017ed\u00e1 sa m\u00f4\u017ee spr\u00e1va\u0165 inak.<\/p>\n
Pri \u010distej kyseline L-askorbovej v\u00fdskum uk\u00e1zal, \u017ee na jej prenikanie do poko\u017eky bolo potrebn\u00e9 pH ni\u017e\u0161ie ako 3,5 [7]. Tak\u00fdto kysl\u00fd v\u00fdrobok v\u0161ak m\u00f4\u017ee citliv\u00fa poko\u017eku dr\u00e1\u017edi\u0165.<\/p>\n
Deriv\u00e1ty vitam\u00ednu C m\u00f4\u017eu by\u0165 stabiln\u00e9 a pou\u017eite\u013en\u00e9 pri in\u00fdch hodnot\u00e1ch pH. Preto neplat\u00ed, \u017ee ka\u017ed\u00e9 s\u00e9rum s vitam\u00ednom C mus\u00ed ma\u0165 pH 3.<\/p>\n
Pri retinole sa niekedy uv\u00e1dza jednoduch\u00e9 pravidlo, \u017ee v\u00fdrobok by mal ma\u0165 pH pribli\u017ene 5 a\u017e 6. V skuto\u010dnosti v\u0161ak stabilitu retinoidov neovplyv\u0148uje iba pH.<\/p>\n
D\u00f4le\u017eit\u00e1 je konkr\u00e9tna forma retinoidu, zlo\u017eenie v\u00fdrobku, svetlo, kysl\u00edk, teplota, obal aj \u010das skladovania. \u0160t\u00fadia komer\u010dn\u00fdch v\u00fdrobkov uk\u00e1zala v\u00fdrazn\u00e9 rozdiely v stabilite retinoidov v z\u00e1vislosti od konkr\u00e9tnej recept\u00fary [8].<\/p>\n
Zmera\u0165 pH kr\u00e9mu teda nesta\u010d\u00ed na to, aby sme zistili, \u010di v \u0148om retinol zostane stabiln\u00fd a \u00fa\u010dinn\u00fd.<\/p>\n
Na internete m\u00f4\u017eete n\u00e1js\u0165 n\u00e1vody, pod\u013ea ktor\u00fdch je nutn\u00e9 nan\u00e1\u0161a\u0165 produkty od najni\u017e\u0161ieho pH po najvy\u0161\u0161ie a medzi jednotliv\u00fdmi vrstvami \u010daka\u0165 napr\u00edklad dvadsa\u0165 min\u00fat.<\/p>\n
Pri be\u017enej starostlivosti o ple\u0165 to v\u00e4\u010d\u0161inou nie je potrebn\u00e9.<\/p>\n
Hotov\u00e9 kozmetick\u00e9 v\u00fdrobky by mali by\u0165 navrhnut\u00e9 tak, aby fungovali pri odpor\u00fa\u010danom pou\u017eit\u00ed. Ove\u013ea d\u00f4le\u017eitej\u0161ie je nepre\u0165a\u017ei\u0165 ple\u0165 nieko\u013ek\u00fdmi dr\u00e1\u017ediv\u00fdmi akt\u00edvnymi l\u00e1tkami naraz.<\/p>\n
Jednoduch\u00e9 poradie zvy\u010dajne sta\u010d\u00ed:<\/strong><\/p>\n Pri kyselin\u00e1ch, retinoidoch alebo \u010fal\u0161\u00edch intenz\u00edvnych akt\u00edvnych l\u00e1tkach sledujte predov\u0161etk\u00fdm odpor\u00fa\u010dania v\u00fdrobcu a reakciu svojej poko\u017eky. Viac akt\u00edvnych l\u00e1tok neznamen\u00e1 automaticky lep\u0161\u00ed v\u00fdsledok.<\/p>\n Pri dom\u00e1cej v\u00fdrobe m\u00f4\u017ee pH ovplyvni\u0165 nielen to, \u010di bude v\u00fdrobok pr\u00edjemn\u00fd na poko\u017eke.<\/p>\n M\u00f4\u017ee ovplyvni\u0165 aj:<\/strong><\/p>\n [\/et_pb_text][et_pb_image src=“https:\/\/green-gate.eu\/wp-content\/uploads\/2026\/07\/articlePh3.png“ _builder_version=“4.23″ _module_preset=“32fecfd5-025d-42fc-9828-d86bb0da2821″ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″][\/et_pb_image][et_pb_text _builder_version=“4.23″ _module_preset=“71bce9ad-9a5c-4bc0-a49d-5ef17a0a743b“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n Zdroj: GreenScan<\/p>\n [\/et_pb_text][et_pb_text _builder_version=“4.23″ _module_preset=“default“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n pH sa preto meria a\u017e pri hotovom, d\u00f4kladne premie\u0161anom v\u00fdrobku. Pri niektor\u00fdch recept\u00farach je vhodn\u00e9 meranie po \u010dase zopakova\u0165, preto\u017ee hodnota sa m\u00f4\u017ee po\u010das skladovania meni\u0165.<\/p>\n Indik\u00e1torov\u00e9 papieriky s\u00fa vhodn\u00e9 na z\u00e1kladn\u00fa orient\u00e1ciu. Pri farebn\u00fdch, hust\u00fdch alebo zakalen\u00fdch v\u00fdrobkoch sa v\u0161ak m\u00f4\u017ee v\u00fdsledok \u0165a\u017eko od\u010d\u00edta\u0165.<\/p>\n Presnej\u0161\u00ed je spr\u00e1vne kalibrovan\u00fd pH meter s elektr\u00f3dou vhodnou pre dan\u00fd typ vzorky. Ani drah\u00fd pH meter v\u0161ak nepom\u00f4\u017ee, ak nie je kalibrovan\u00fd alebo ak meriate nespr\u00e1vnym sp\u00f4sobom.<\/p>\n pH nie je \u010d\u00edslo, ktor\u00e9 sta\u010d\u00ed raz zmera\u0165 a od\u0161krtn\u00fa\u0165.<\/p>\n [\/et_pb_text][et_pb_image src=“https:\/\/green-gate.eu\/wp-content\/uploads\/2026\/07\/ph_cover.png“ _builder_version=“4.23″ _module_preset=“32fecfd5-025d-42fc-9828-d86bb0da2821″ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″][\/et_pb_image][et_pb_text _builder_version=“4.23″ _module_preset=“71bce9ad-9a5c-4bc0-a49d-5ef17a0a743b“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n Zdroj: GreenScan<\/p>\n [\/et_pb_text][et_pb_text _builder_version=“4.23″ _module_preset=“default“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n Toto je pri DIY kozmetike naozaj d\u00f4le\u017eit\u00e9.<\/p>\n Ak v\u00fdrobok obsahuje vodu, hydrol\u00e1t, bylinn\u00fd v\u00fdluh alebo in\u00fa vodn\u00fa zlo\u017eku, m\u00f4\u017eu sa v \u0148om mno\u017ei\u0165 bakt\u00e9rie, kvasinky alebo plesne. To, \u017ee m\u00e1 tonikum pH 5, neznamen\u00e1, \u017ee je automaticky mikrobiologicky bezpe\u010dn\u00e9. Mnoh\u00e9 mikroorganizmy dok\u00e1\u017eu r\u00e1s\u0165 pr\u00e1ve v rozmedz\u00ed pH be\u017enom pri kozmetick\u00fdch v\u00fdrobkoch. \u00da\u010dinnos\u0165 konzerv\u00e1cie navy\u0161e z\u00e1vis\u00ed od konkr\u00e9tneho konzervantu, jeho mno\u017estva, pH, obalu a cel\u00e9ho zlo\u017eenia [9].<\/p>\n Spr\u00e1vne pH preto nenahr\u00e1dza: Pri komer\u010dnej kozmetike sa \u00fa\u010dinnos\u0165 konzerva\u010dn\u00e9ho syst\u00e9mu overuje aj z\u00e1\u0165a\u017eov\u00fdm testom, pri ktorom sa sleduje, \u010di si v\u00fdrobok dok\u00e1\u017ee poradi\u0165 s pridan\u00fdmi mikroorganizmami [9].<\/p>\n Dom\u00e1ce tonikum teda nie je bezpe\u010dn\u00e9 na nieko\u013eko mesiacov len preto, \u017ee pekne vonia, vyzer\u00e1 rovnako a stoj\u00ed v chladni\u010dke. Mikrobi\u00e1lnu kontamin\u00e1ciu \u010dasto nemus\u00edme spozna\u0165 poh\u013eadom ani \u010duchom.<\/p>\n \u010cisto olejov\u00fd balzam alebo zmes oleja a masla zvy\u010dajne nepotrebuj\u00fa mera\u0165 pH. Ke\u010f\u017ee neobsahuj\u00fa vodu, maj\u00fa aj v\u00fdrazne ni\u017e\u0161ie riziko rastu mikroorganizmov ne\u017e vodn\u00e9 v\u00fdrobky.<\/p>\n To v\u0161ak neznamen\u00e1, \u017ee s\u00fa nesmrte\u013en\u00e9.<\/p>\n Oleje m\u00f4\u017eu oxidova\u0165 a \u017eltn\u00fa\u0165. A ak do t\u00e9glika opakovane siahame mokr\u00fdmi prstami alebo sa do\u0148 dostane voda zo sprchy, podmienky sa menia.<\/p>\n Tak\u017ee \u010dist\u00e9 ruky, such\u00e1 ly\u017ei\u010dka a \u017eiadna voda v t\u00e9gliku. \u00c1no, aj tak\u00e1to drobnos\u0165 m\u00f4\u017ee rozhodova\u0165.<\/p>\n [\/et_pb_text][et_pb_image src=“https:\/\/green-gate.eu\/wp-content\/uploads\/2026\/07\/articlePh5.png“ _builder_version=“4.23″ _module_preset=“32fecfd5-025d-42fc-9828-d86bb0da2821″ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″][\/et_pb_image][et_pb_text _builder_version=“4.23″ _module_preset=“71bce9ad-9a5c-4bc0-a49d-5ef17a0a743b“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n Zdroj: GreenScan<\/p>\n [\/et_pb_text][et_pb_text _builder_version=“4.23″ _module_preset=“default“ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n pH sa upravuje ve\u013emi opatrne, po mal\u00fdch mno\u017estv\u00e1ch vhodn\u00e9ho zrieden\u00e9ho roztoku kyseliny alebo z\u00e1sady.<\/p>\n Nie je dobr\u00fd n\u00e1pad nasypa\u0165 do v\u00fdrobku od oka kyselinu citr\u00f3nov\u00fa alebo jedl\u00fa s\u00f3du. \u013dahko pH prestrel\u00edte a potom budete striedavo prid\u00e1va\u0165 kyselinu a z\u00e1sadu, k\u00fdm recept nebude pripom\u00edna\u0165 chemick\u00fd gul\u00e1\u0161.<\/p>\n Po ka\u017edom pridan\u00ed je potrebn\u00e9 v\u00fdrobok d\u00f4kladne premie\u0161a\u0165 a znova zmera\u0165.<\/p>\n Pri recepte by ste mali vedie\u0165:<\/strong><\/p>\n \u017daneta: <\/strong>Ak pri recepte nie je uveden\u00e9 v\u00fdsledn\u00e9 pH, sp\u00f4sob jeho zmerania ani inform\u00e1cia o konzerv\u00e1cii, spozornela by som. Zvl\u00e1\u0161\u0165 ak ide o s\u00e9rum, tonikum alebo kr\u00e9m obsahuj\u00faci vodu. \u201ePr\u00edrodn\u00e9\u201c toti\u017e automaticky neznamen\u00e1 bezpe\u010dn\u00e9 a dom\u00e1ce neznamen\u00e1, \u017ee m\u00f4\u017eeme presko\u010di\u0165 ch\u00e9miu.<\/em><\/p>\n [\/et_pb_text][et_pb_text _builder_version=“4.23″ _module_preset=“ad82dfb1-835c-4330-9bf8-b00b8058f328″ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n GG tip: <\/strong>pH je d\u00f4le\u017eit\u00e9, ale samo osebe nerozhoduje o tom, \u010di je kozmetika kvalitn\u00e1 a bezpe\u010dn\u00e1.<\/p>\n Produkt s pH 5,5 m\u00f4\u017ee obsahova\u0165 nevhodne zvolen\u00e9 tenzidy, dr\u00e1\u017ediv\u00fa parfum\u00e1ciu alebo nefunk\u010dn\u00fa konzerv\u00e1ciu. In\u00fd produkt m\u00f4\u017ee ma\u0165 trochu odli\u0161n\u00e9 pH, ale by\u0165 dobre zostaven\u00fd a poko\u017eke vyhovova\u0165.<\/p>\n Nepozerajte sa preto len na jedno \u010d\u00edslo. Sledujte cel\u00fa recept\u00faru, koncentr\u00e1cie ingredienci\u00ed, sp\u00f4sob pou\u017eitia, obal a potreby svojej poko\u017eky.<\/p>\n Preto\u017ee rovnako ako pri zlo\u017een\u00ed nakoniec nerozhoduje marketing. Rozhoduje, \u010do vo v\u00fdrobku skuto\u010dne je a ako to cel\u00e9 funguje dohromady.<\/p>\n [\/et_pb_text][et_pb_text _builder_version=“4.23″ _module_preset=“b69f9b3d-c69a-4c5f-a3b8-4a8a74c4c1a0″ theme_builder_area=“post_content“ hover_enabled=“0″ sticky_enabled=“0″]<\/p>\n [1] Buck et al. Measurement of pH. Definition, standards, and procedures. Pure and Applied Chemistry, 2002, 74(11), 2169\u20132200. [2] Lambers et al. Natural skin surface pH is on average below 5, which is beneficial for its resident flora. International Journal of Cosmetic Science, 2006, 28(5), 359\u2013370. [3] Schmid-Wendtner, Korting. The pH of the skin surface and its impact on the barrier function. Skin Pharmacology and Physiology, 2006, 19(6), 296\u2013302. [4] Blaak, Staib. The Relation of pH and Skin Cleansing. Current Problems in Dermatology, 2018, 54, 132\u2013142. [5] Ananthapadmanabhan et al. Cleansing without compromise: the impact of cleansers on the skin barrier and the technology of mild cleansing. Dermatologic Therapy, 2004, 17, 16\u201325. [6] Kornhauser, Coelho, Hearing. Applications of hydroxy acids: classification, mechanisms, and photoactivity. Clinical, Cosmetic and Investigational Dermatology, 2010, 3, 135\u2013142. [7] Pinnell et al. Topical L-ascorbic acid: percutaneous absorption studies. Dermatologic Surgery, 2001, 27(2), 137\u2013142. [8] Temova Raku\u0161a et al. Retinoid stability and degradation kinetics in commercial cosmetic products. Journal of Cosmetic Dermatology, 2021, 20(7), 2350\u20132358.\n
DIY kozmetika: Tu je pH naozaj d\u00f4le\u017eit\u00e9<\/h4>\n
\n
Papieriky alebo pH meter?<\/h4>\n
Spr\u00e1vne pH nie je konzervant<\/h4>\n
To, \u017ee m\u00e1 tonikum pH 5, neznamen\u00e1, \u017ee je automaticky mikrobiologicky bezpe\u010dn\u00e9. Mnoh\u00e9 mikroorganizmy dok\u00e1\u017eu r\u00e1s\u0165 pr\u00e1ve v rozmedz\u00ed pH be\u017enom pri kozmetick\u00fdch v\u00fdrobkoch. \u00da\u010dinnos\u0165 konzerv\u00e1cie navy\u0161e z\u00e1vis\u00ed od konkr\u00e9tneho konzervantu, jeho mno\u017estva, pH, obalu a cel\u00e9ho zlo\u017eenia [9].
Spr\u00e1vne pH preto nenahr\u00e1dza:
vhodn\u00fd konzerva\u010dn\u00fd syst\u00e9m
hygienick\u00fa v\u00fdrobu
\u010dist\u00e9 n\u00e1doby a pom\u00f4cky
spr\u00e1vne d\u00e1vkovanie ingredienci\u00ed
vhodn\u00fd obal
mikrobiologick\u00e9 testovanie<\/p>\n
vhodn\u00fd konzerva\u010dn\u00fd syst\u00e9m
hygienick\u00fa v\u00fdrobu
\u010dist\u00e9 n\u00e1doby a pom\u00f4cky
spr\u00e1vne d\u00e1vkovanie ingredienci\u00ed
vhodn\u00fd obal
mikrobiologick\u00e9 testovanie<\/strong><\/p>\n\n
A \u010do bezvod\u00e1 kozmetika?<\/h4>\n
Ako pH dom\u00e1cej kozmetiky upravi\u0165?<\/h4>\n
\n
Zdroje<\/h4>\n
https:\/\/doi.org\/10.1351\/pac200274112169<\/a><\/p>\n
https:\/\/pubmed.ncbi.nlm.nih.gov\/18489300\/<\/a><\/p>\n
https:\/\/pubmed.ncbi.nlm.nih.gov\/16864974\/<\/a><\/p>\n
https:\/\/pubmed.ncbi.nlm.nih.gov\/30130782\/<\/a><\/p>\n
https:\/\/pubmed.ncbi.nlm.nih.gov\/14728695\/<\/a><\/p>\n
https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3047947\/<\/a><\/p>\n
https:\/\/pubmed.ncbi.nlm.nih.gov\/11207686\/<\/a><\/p>\n
https:\/\/pubmed.ncbi.nlm.nih.gov\/33206444\/<\/a><\/p>\n