{"id":30603,"date":"2025-10-11T21:37:28","date_gmt":"2025-10-11T20:37:28","guid":{"rendered":"https:\/\/www.certifiedcosmetics.com\/product\/nezarazene\/test-transepidermalni-ztraty-vody-tewl\/"},"modified":"2025-10-11T21:37:28","modified_gmt":"2025-10-11T20:37:28","slug":"test-transepidermalni-ztraty-vody-tewl","status":"publish","type":"product","link":"https:\/\/www.certifiedcosmetics.com\/cs\/product\/testovani-ucinnosti\/kozni-testy\/test-transepidermalni-ztraty-vody-tewl\/","title":{"rendered":"Test transepiderm\u00e1ln\u00ed ztr\u00e1ty vody (TEWL)"},"content":{"rendered":"<p>Test TEWL (transepiderm\u00e1ln\u00ed ztr\u00e1ta vody) je laboratorn\u00ed metoda pou\u017e\u00edvan\u00e1 k hodnocen\u00ed integrity a funk\u010dnosti ko\u017en\u00ed bari\u00e9ry. M\u011b\u0159\u00ed rychlost, jakou se voda p\u0159irozen\u011b odpa\u0159uje z povrchu k\u016f\u017ee, a poskytuje tak p\u0159esn\u00fd \u00fadaj o stavu ko\u017en\u00ed bari\u00e9ry a \u00fa\u010dinnosti hydratace. Tento test je nezbytn\u00fd pro posouzen\u00ed \u00fa\u010dink\u016f kosmetick\u00fdch p\u0159\u00edpravk\u016f, jako jsou kr\u00e9my, s\u00e9ra, \u010distic\u00ed p\u0159\u00edpravky a p\u0159\u00edpravky na obnovu ko\u017en\u00ed bari\u00e9ry.  <\/p>\n<h2>\u00da\u010del testu TEWL<\/h2>\n<p>Test TEWL pom\u00e1h\u00e1 ur\u010dit, zda kosmetick\u00fd p\u0159\u00edpravek posiluje, udr\u017euje nebo naru\u0161uje ochrannou bari\u00e9ru poko\u017eky. Poskytuje cenn\u00e9 informace o \u00fa\u010dinnosti p\u0159\u00edpravku, zejm\u00e9na u produkt\u016f, kter\u00e9 maj\u00ed podle v\u00fdrobce sni\u017eovat suchost, zlep\u0161ovat hydrataci nebo chr\u00e1nit p\u0159ed \u0161kodliv\u00fdmi vlivy \u017eivotn\u00edho prost\u0159ed\u00ed. <\/p>\n<h2>Jak test funguje<\/h2>\n<p>M\u011b\u0159en\u00ed TEWL se prov\u00e1d\u00ed pomoc\u00ed <strong>p\u0159\u00edstrojov\u00e9ho testu<\/strong>, obvykle za pou\u017eit\u00ed specializovan\u00e9ho za\u0159\u00edzen\u00ed, jako je odpa\u0159ovac\u00ed p\u0159\u00edstroj s otev\u0159enou nebo uzav\u0159enou komorou. P\u0159\u00edstroj m\u011b\u0159\u00ed tok vodn\u00ed p\u00e1ry z povrchu k\u016f\u017ee za kontrolovan\u00fdch teplotn\u00edch a vlhkostn\u00edch podm\u00ednek. V\u00fdsledky se uv\u00e1d\u011bj\u00ed v gramech vody na metr \u010dtvere\u010dn\u00ed za hodinu (g\/m\u00b2h) a p\u0159edstavuj\u00ed rychlost ztr\u00e1ty vody p\u0159es epidermis.  <\/p>\n<h2>Vyu\u017eit\u00ed p\u0159i testov\u00e1n\u00ed kosmetick\u00fdch p\u0159\u00edpravk\u016f<\/h2>\n<ul>\n<li>Hodnocen\u00ed zvlh\u010duj\u00edc\u00edch nebo hydrata\u010dn\u00edch p\u0159\u00edpravk\u016f<\/li>\n<li>Hodnocen\u00ed kr\u00e9m\u016f s regenera\u010dn\u00edm nebo ochrann\u00fdm \u00fa\u010dinkem<\/li>\n<li>Ov\u011b\u0159en\u00ed tvrzen\u00ed t\u00fdkaj\u00edc\u00edch se \u201eudr\u017eov\u00e1n\u00ed vlhkosti\u201c nebo \u201ezlep\u0161en\u00ed bari\u00e9rov\u00e9 funkce\u201c<\/li>\n<li>Testov\u00e1n\u00ed v\u00fdrobk\u016f pro citlivou nebo po\u0161kozenou poko\u017eku<\/li>\n<li>Srovn\u00e1vac\u00ed studie p\u0159ed a po aplikaci produktu<\/li>\n<\/ul>\n<h2>Zku\u0161ebn\u00ed postup<\/h2>\n<ol>\n<li>Dobrovoln\u00edci jsou aklimatizov\u00e1ni v kontrolovan\u00e9m prost\u0159ed\u00ed (teplota a vlhkost).<\/li>\n<li>V\u00fdchoz\u00ed hodnoty TEWL se zaznamen\u00e1vaj\u00ed na neo\u0161et\u0159en\u00e9 k\u016f\u017ei.<\/li>\n<li>Zkou\u0161en\u00fd v\u00fdrobek se aplikuje v souladu s podm\u00ednkami ur\u010den\u00e9ho pou\u017eit\u00ed.<\/li>\n<li>Hodnoty TEWL se m\u011b\u0159\u00ed znovu v p\u0159edem stanoven\u00fdch intervalech (nap\u0159. po 30 minut\u00e1ch, 2 hodin\u00e1ch, 24 hodin\u00e1ch).<\/li>\n<li>Data se analyzuj\u00ed za \u00fa\u010delem zji\u0161t\u011bn\u00ed vlivu produktu na ko\u017en\u00ed bari\u00e9ru.<\/li>\n<\/ol>\n<h2>V\u00fdsledky a pod\u00e1v\u00e1n\u00ed zpr\u00e1v<\/h2>\n<p>Z\u00e1v\u011bre\u010dn\u00e1 zpr\u00e1va obsahuje:<\/p>\n<ul>\n<li>Podrobn\u00fd popis zku\u0161ebn\u00edch podm\u00ednek a pou\u017eit\u00e9ho za\u0159\u00edzen\u00ed<\/li>\n<li>Pr\u016fm\u011brn\u00e9 hodnoty TEWL p\u0159ed a po aplikaci p\u0159\u00edpravku<\/li>\n<li>Statistick\u00e1 anal\u00fdza zji\u0161t\u011bn\u00fdch rozd\u00edl\u016f<\/li>\n<li>Vyhodnocen\u00ed \u00fa\u010dinnosti bari\u00e9rov\u00e9 funkce<\/li>\n<li>Grafick\u00e9 zn\u00e1zorn\u011bn\u00ed v\u00fdsledk\u016f (voliteln\u00e9)<\/li>\n<\/ul>\n<h2>Pro\u010d je testov\u00e1n\u00ed TEWL d\u016fle\u017eit\u00e9<\/h2>\n<p>Ko\u017en\u00ed bari\u00e9ra hraje z\u00e1sadn\u00ed roli p\u0159i udr\u017eov\u00e1n\u00ed rovnov\u00e1hy vlhkosti a ochran\u011b p\u0159ed dr\u00e1\u017ediv\u00fdmi l\u00e1tkami. Naru\u0161en\u00e1 bari\u00e9ra vede k suchosti, zarudnut\u00ed a citlivosti. M\u011b\u0159en\u00ed TEWL poskytuj\u00ed objektivn\u00ed \u00fadaje, kter\u00e9 potvrzuj\u00ed, zda v\u00e1\u0161 p\u0159\u00edpravek \u00fa\u010dinn\u011b podporuje obnovu bari\u00e9ry a hydrataci \u2013 kl\u00ed\u010dov\u00e9 faktory pro ov\u011b\u0159en\u00ed \u00fa\u010dinnosti p\u0159\u00edpravku a marketingov\u00e1 tvrzen\u00ed.  <\/p>\n<h2>Po\u017eadavky na vzorky<\/h2>\n<ul>\n<li>Minim\u00e1ln\u00ed mno\u017estv\u00ed: 11 hotov\u00fdch v\u00fdrobk\u016f<\/li>\n<li>Typ p\u0159\u00edpravku: jak\u00e1koli forma pro lok\u00e1ln\u00ed pou\u017eit\u00ed (kr\u00e9m, ple\u0165ov\u00e9 ml\u00e9ko, s\u00e9rum, \u010distic\u00ed p\u0159\u00edpravek, mast)<\/li>\n<li>Podm\u00ednky skladov\u00e1n\u00ed: pokojov\u00e1 teplota, nen\u00ed-li uvedeno jinak<\/li>\n<\/ul>\n<h2>Obvykl\u00e1 doba zpracov\u00e1n\u00ed<\/h2>\n<p>Laboratorn\u00ed testov\u00e1n\u00ed trv\u00e1 4 t\u00fddny od data p\u0159ijet\u00ed vzorku a schv\u00e1len\u00ed protokolu. Krom\u011b toho pros\u00edm po\u010d\u00edtejte s p\u0159ibli\u017en\u011b 5\u20137 pracovn\u00edmi dny na shrom\u00e1\u017ed\u011bn\u00ed v\u00fdsledk\u016f, jejich anal\u00fdzu a vystaven\u00ed zpr\u00e1vy. <\/p>\n<h2>V\u00fdstupy<\/h2>\n<ul>\n<li>\u00dapln\u00e1 laboratorn\u00ed zpr\u00e1va ve form\u00e1tu PDF<\/li>\n<li>Souhrn v\u00fdsledk\u016f vhodn\u00fd pro regula\u010dn\u00ed nebo marketingovou dokumentaci<\/li>\n<li>Voliteln\u00e9 zahrnut\u00ed \u00fadaj\u016f do zpr\u00e1v o dolo\u017een\u00ed n\u00e1rok\u016f<\/li>\n<\/ul>\n<h2>Dodr\u017eov\u00e1n\u00ed p\u0159edpis\u016f a normy<\/h2>\n<p>Tento test se \u0159\u00edd\u00ed pokyny, kter\u00e9 jsou v souladu s <strong>mezin\u00e1rodn\u00edmi normami pro testov\u00e1n\u00ed kosmetick\u00fdch p\u0159\u00edpravk\u016f<\/strong> a postupy pro zaji\u0161t\u011bn\u00ed kvality laborato\u0159\u00ed <strong>podle normy ISO 15197<\/strong>. V\u0161echny studie se prov\u00e1d\u011bj\u00ed za kontrolovan\u00fdch podm\u00ednek prost\u0159ed\u00ed, aby byla zaji\u0161t\u011bna p\u0159esnost a reprodukovatelnost. <\/p>\n<h2>Souvisej\u00edc\u00ed testy<\/h2>\n<ul>\n<li>Korneometrie (test hydratace poko\u017eky)<\/li>\n<li>Sebumeter (m\u011b\u0159en\u00ed ko\u017en\u00edch lipid\u016f)<\/li>\n<li>M\u011b\u0159en\u00ed pH povrchu k\u016f\u017ee<\/li>\n<li>Klinick\u00e9 hodnocen\u00ed p\u0159\u00edpravk\u016f na regeneraci ko\u017en\u00ed bari\u00e9ry<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Test TEWL (transepiderm\u00e1ln\u00ed ztr\u00e1ta vody) je laboratorn\u00ed metoda pou\u017e\u00edvan\u00e1 k hodnocen\u00ed integrity a funk\u010dnosti ko\u017en\u00ed bari\u00e9ry. M\u011b\u0159\u00ed rychlost, jakou se voda p\u0159irozen\u011b odpa\u0159uje z povrchu k\u016f\u017ee, a poskytuje tak p\u0159esn\u00fd \u00fadaj o stavu ko\u017en\u00ed bari\u00e9ry a \u00fa\u010dinnosti hydratace. Tento test je nezbytn\u00fd pro posouzen\u00ed \u00fa\u010dink\u016f kosmetick\u00fdch p\u0159\u00edpravk\u016f, jako jsou kr\u00e9my, s\u00e9ra, \u010distic\u00ed p\u0159\u00edpravky a p\u0159\u00edpravky&#8230;<\/p>\n","protected":false},"featured_media":30604,"template":"","meta":[],"product_brand":[],"product_cat":[2722,2721],"product_tag":[],"class_list":["post-30603","product","type-product","status-publish","has-post-thumbnail","product_cat-kozni-testy","product_cat-testovani-ucinnosti","first","instock","virtual","taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"instock","bundle_stock_quantity":null,"bundle_virtual":false,"bundle_layout":"","bundle_add_to_cart_form_location":"","bundle_editable_in_cart":false,"bundle_sold_individually_context":"","bundle_item_grouping":"","bundle_min_size":"","bundle_max_size":"","bundle_price":[],"bundled_items":[],"bundle_sell_ids":[],"exclude_global_add_ons":[],"addons":[],"yoast_head":"<!-- This site is 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