{"id":36810,"date":"2026-11-04T20:08:45","date_gmt":"2026-11-04T19:08:45","guid":{"rendered":"https:\/\/www.certifiedcosmetics.com\/blog\/uncategorized-hr\/objasnjenje-standarda-testiranja-uva-e\/"},"modified":"2026-11-04T20:08:45","modified_gmt":"2026-11-04T19:08:45","slug":"objasnjenje-standarda-testiranja-uva-e","status":"publish","type":"post","link":"https:\/\/www.certifiedcosmetics.com\/hr\/blog\/laboratorijsko-ispitivanje\/objasnjenje-standarda-testiranja-uva-e\/","title":{"rendered":"Obja\u0161njenje standarda testiranja UVA-e"},"content":{"rendered":"

\"\"Za\u0161tita od sunca \u010desto se povezuje sa SPF-om, ali SPF prvenstveno opisuje za\u0161titu od ultraljubi\u010dastog B (UVB) zra\u010denja. Krema za sun\u010danje koja pru\u017ea sna\u017enu UVB za\u0161titu ne pru\u017ea automatski odgovaraju\u0107u za\u0161titu od ultraljubi\u010dastog A (UVA) zra\u010denja.<\/p>\n

Zbog toga europske smjernice za kreme za sun\u010danje pridaju posebnu va\u017enost uravnote\u017eenoj za\u0161titi od UVB i UVA zra\u010denja. Proizvo\u0111a\u010di krema za sun\u010danje ili kozmeti\u010dkih proizvoda s tvrdnjama o za\u0161titi od sunca stoga bi trebali procijeniti UVA za\u0161titu koriste\u0107i odgovaraju\u0107e i znanstveno priznate metode ispitivanja.<\/p>\n

\u0160to je UVA zra\u010denje?<\/h2>\n

Ultraljubi\u010dasto zra\u010denje sunca se obi\u010dno dijeli na UVA i UVB zra\u010denje.<\/p>\n

UVB zra\u010denje sna\u017eno je povezano s opeklinama od sunca i glavna je vrsta zra\u010denja koja se mjeri pri odre\u0111ivanju faktora za\u0161tite od sunca ili SPF-a.<\/p>\n

UVA zra\u010denje prodire dublje u ko\u017eu<\/strong> i doprinosi preranom starenju ko\u017ee<\/strong> i dugoro\u010dnom o\u0161te\u0107enju ko\u017ee<\/strong> . Tako\u0111er je uklju\u010deno u procese povezane s razvojem raka ko\u017ee.<\/p>\n

Za razliku od UVB zra\u010denja, izlo\u017eenost UVA zra\u010denju ne izaziva uvijek trenutnu vidljivu reakciju poput opeklina od sunca. Stoga potro\u0161a\u010di mogu biti izlo\u017eeni zna\u010dajnom UVA zra\u010denju, a da odmah ne primijete njegove u\u010dinke.<\/p>\n

Zato u\u010dinkoviti proizvodi za za\u0161titu od sunca trebaju pru\u017eati za\u0161titu u \u0161irokom rasponu ultraljubi\u010dastog spektra.<\/p>\n

Za\u0161to je UVA testiranje potrebno?<\/h2>\n

Sama vrijednost SPF-a ne mo\u017ee pokazati razinu UVA za\u0161tite koju pru\u017ea krema za sun\u010danje.<\/p>\n

Dvije formulacije s istim SPF-om mogu pru\u017eiti vrlo razli\u010dite razine UVA za\u0161tite. Vrsta kori\u0161tenih UV filtera, njihove koncentracije, fotostabilnost, raspodjela unutar formulacije i film stvoren na ko\u017ei mogu utjecati na UVA u\u010dinkovitost.<\/p>\n

UVA testiranje pru\u017ea mjerljive dokaze o za\u0161titi koju pru\u017ea gotov proizvod.<\/p>\n

Prema Uredbi Komisije (EU) br. 655\/2013, tvrdnje o kozmetici trebaju biti potkrijepljene odgovaraju\u0107im i provjerljivim dokazima. Stoga bi proizvo\u0111a\u010di koji iznose tvrdnje o UVA ili za\u0161titi \u0161irokog spektra trebali imati odgovaraju\u0107e podatke o ispitivanjima kako bi potkrijepili te tvrdnje.<\/p>\n

Europski zahtjevi za UVA za\u0161titu<\/h2>\n

Preporuka Europske komisije 2006\/647\/EZ<\/a> utvr\u0111uje va\u017eno na\u010delo za uravnote\u017eenu za\u0161titu od sunca.<\/p>\n

UVA faktor za\u0161tite trebao bi biti barem jedna tre\u0107ina navedenog SPF-a.<\/strong><\/p>\n

Na primjer, krema za sun\u010danje s oznakom SPF 30 trebala bi pru\u017eati UVA za\u0161titni faktor od najmanje 10. Proizvod s oznakom SPF 50 trebao bi pru\u017eati UVA za\u0161titni faktor od najmanje pribli\u017eno 16,7.<\/p>\n

Preporuka tako\u0111er navodi da kriti\u010dna valna duljina<\/strong> treba biti najmanje 370 nanometara.<\/p>\n

Ovi kriteriji imaju za cilj osigurati da proizvodi za sun\u010danje pru\u017eaju dovoljno \u0161iroku za\u0161titu<\/strong> u cijelom UVA i UVB spektru, umjesto da se za\u0161tita prvenstveno koncentrira u UVB rasponu.<\/p>\n

ISO 24443: In vitro UVA ispitivanje<\/h2>\n

Jedan od glavnih me\u0111unarodnih standarda koji se koriste za procjenu UVA za\u0161tite je ISO 24443:2021, Kozmetika – Odre\u0111ivanje fotoza\u0161tite od UVA zra\u010denja kremom za sun\u010danje in vitro<\/em> .<\/p>\n

Ova norma specificira in vitro postupak za karakterizaciju UVA za\u0161tite proizvoda za sun\u010danje. Osmi\u0161ljen je za generiranje krivulje UV spektralne apsorbancije iz koje se mogu izra\u010dunati relevantni parametri UVA za\u0161tite.<\/p>\n

Tijekom ispitivanja, kontrolirana koli\u010dina kreme za sun\u010danje nanosi se na posebno pripremljene testne plo\u010de. Proizvod se pa\u017eljivo raspore\u0111uje kako bi se stvorio reprezentativni film.<\/p>\n

Prijenos ultraljubi\u010dastog zra\u010denja kroz sloj proizvoda zatim se mjeri pomo\u0107u specijalizirane laboratorijske opreme. Uzorci se tako\u0111er izla\u017eu definiranoj UV dozi kako bi se procijenio proizvod nakon ozra\u010divanja.<\/p>\n

Dobiveni spektralni podaci koriste se za odre\u0111ivanje in vitro faktora UVA za\u0161tite i procjenu UVA u\u010dinkovitosti proizvoda.<\/p>\n

Budu\u0107i da tehnika primjene, karakteristike plo\u010de, uvjeti ozra\u010divanja i instrumentalna mjerenja mogu utjecati na rezultat, postupak treba provesti prema standardiziranoj metodologiji u iskusnom laboratoriju<\/a> . Norma ISO 24443:2021 posebno utvr\u0111uje in vitro postupak namijenjen karakterizaciji UVA za\u0161tite i reproducibilnom odre\u0111ivanju karakteristika spektralne apsorbancije.<\/p>\n

ISO 24442: UVA testiranje in vivo<\/h2>\n

UVA za\u0161tita mo\u017ee se procijeniti i in vivo metodom opisanom u ISO 24442.<\/p>\n

Ova metoda odre\u0111uje UVA za\u0161titu kod ljudi procjenjuju\u0107i trajno potamnjenje pigmenta uzrokovano kontroliranom izlo\u017eeno\u0161\u0107u UVA zra\u010denju.<\/p>\n

Krema za sun\u010danje nanosi se na odre\u0111ena podru\u010dja ko\u017ee. Ta se podru\u010dja zatim izla\u017eu pa\u017eljivo kontroliranom UVA zra\u010denju, a reakcija ko\u017ee procjenjuje se prema standardiziranom postupku.<\/p>\n

Rezultati se koriste za izra\u010dun faktora UVA za\u0161tite testiranog proizvoda.<\/p>\n

In vivo UVA testiranje zahtijeva pa\u017eljivo kontrolirane uvjete istra\u017eivanja, odgovaraju\u0107i odabir sudionika i kvalificirano osoblje. Zbog toga bi ga trebali provoditi samo laboratoriji s odgovaraju\u0107im iskustvom i eti\u010dkim nadzorom.<\/p>\n

\u0160to je kriti\u010dna valna duljina?<\/h2>\n

Kriti\u010dna valna duljina je mjerenje koje se koristi za procjenu koliko \u0161iroko krema za sun\u010danje apsorbira ultraljubi\u010dasto zra\u010denje.<\/p>\n

Izra\u010dunava se iz spektra UV apsorpcije kreme za sun\u010danje. Vi\u0161a kriti\u010dna valna duljina op\u0107enito ukazuje na to da se za\u0161tita prote\u017ee dalje u UVA raspon.<\/p>\n

Prema Preporuci Europske komisije o kremama za sun\u010danje, kriti\u010dna valna duljina trebala bi biti najmanje 370 nm.<\/p>\n

Ovaj zahtjev poma\u017ee pokazati da krema za sun\u010danje pru\u017ea za\u0161titu \u0161irokog spektra, a ne sna\u017enu za\u0161titu samo unutar uskog dijela UV spektra.<\/p>\n

Kriti\u010dna valna duljina ne smije se mije\u0161ati s UVA-PF. Ta dva mjerenja pru\u017eaju razli\u010dite informacije i koriste se zajedno pri procjeni UVA u\u010dinkovitosti kreme za sun\u010danje.<\/p>\n

Logotip kruga UVA-e<\/h2>\n

Mnogi proizvodi za za\u0161titu od sunca koji se prodaju u Europi imaju slova “UVA” unutar kruga.<\/p>\n

Ovaj se simbol \u0161iroko koristi kako bi se ozna\u010dilo da proizvod pru\u017ea UVA za\u0161titu u skladu s preporu\u010denim odnosom Europske komisije izme\u0111u UVA za\u0161tite i SPF-a.<\/p>\n

Simbol se smije koristiti samo kada su UVA performanse proizvoda odgovaraju\u0107e potkrijepljene testiranjem.<\/p>\n

Proizvo\u0111a\u010di bi stoga trebali osigurati da izmjereni UVA faktor za\u0161tite zadovoljava preporu\u010deni minimum od jedne tre\u0107ine ozna\u010denog SPF-a i da su zadovoljeni relevantni kriteriji \u0161irokog spektra prije upotrebe oznaka UVA za\u0161tite na pakiranju.<\/p>\n

Dokumentiranje rezultata UVA testa<\/h2>\n

Izvje\u0161\u0107a o UVA ispitivanju treba \u010duvati kao dio tehni\u010dke dokumentacije koja prati kozmeti\u010dki proizvod.<\/p>\n

Datoteka s informacijama o proizvodu<\/a> , ili PIF, mora sadr\u017eavati dokaz o u\u010dincima navedenim za kozmeti\u010dki proizvod kada je to opravdano prirodom ili u\u010dinkom proizvoda.<\/p>\n

Za kremu za sun\u010danje koja tvrdi da \u0161titi od UVA-a, laboratorijski izvje\u0161taji i prate\u0107a dokumentacija o u\u010dinkovitosti poma\u017eu u dokazivanju da su tvrdnje predstavljene potro\u0161a\u010dima na odgovaraju\u0107i na\u010din potkrijepljene.<\/p>\n

Dokumentacija treba jasno identificirati testirani proizvod i kori\u0161tenu metodu kako bi se rezultati mogli povezati s formulacijom stavljenom na tr\u017ei\u0161te.<\/p>\n

\u0160to se doga\u0111a ako proizvod ne pro\u0111e UVA testiranje?<\/h2>\n

Krema za sun\u010danje mo\u017ee posti\u0107i svoj \u017eeljeni SPF, ali i dalje ne\u0107e pru\u017eiti dovoljnu UVA za\u0161titu.<\/p>\n

Na primjer, izmjereni UVA-PF mo\u017ee biti ispod jedne tre\u0107ine SPF vrijednosti ili proizvod mo\u017eda ne\u0107e posti\u0107i o\u010dekivanu kriti\u010dnu valnu duljinu.<\/p>\n

U takvim slu\u010dajevima, proizvo\u0111a\u010di \u0107e mo\u017eda morati preispitati sustav UV filtera, pobolj\u0161ati fotostabilnost, prilagoditi formulaciju ili pregledati navedenu razinu za\u0161tite.<\/p>\n

Nakon zna\u010dajne promjene formulacije, proizvod treba ponovno testirati kako bi se provjerila njegova u\u010dinkovitost.<\/p>\n

Va\u017enost UVA za\u0161tite u proizvodima za sun\u010danje<\/h2>\n

UVA testiranje je temeljni dio procjene u\u010dinkovitosti krema za sun\u010danje na europskom tr\u017ei\u0161tu. Dok SPF prvenstveno mjeri za\u0161titu od UVB zra\u010denja, UVA testiranje pokazuje pru\u017ea li proizvod i odgovaraju\u0107u za\u0161titu du\u017e duljih ultraljubi\u010dastih valnih duljina.<\/p>\n

Preporuka Europske komisije 2006\/647\/EZ preporu\u010duje faktor za\u0161tite od UVA zra\u010denja od najmanje jedne tre\u0107ine ozna\u010denog SPF-a i kriti\u010dnu valnu duljinu od najmanje 370 nm. Me\u0111unarodni standardi poput ISO 24443 pru\u017eaju standardizirane metode za procjenu fotoza\u0161tite od UVA zra\u010denja in vitro.<\/p>\n

Za proizvo\u0111a\u010de kozmetike, UVA testiranje nije samo laboratorijska formalnost. Ono pru\u017ea znanstvene dokaze potrebne za potkrepljivanje smislenih tvrdnji o za\u0161titi od sunca, odr\u017eavanje to\u010dne dokumentacije o proizvodima i ponudu potro\u0161a\u010dima uravnote\u017eene za\u0161tite od UVA i UVB zra\u010denja.<\/p>\n","protected":false},"excerpt":{"rendered":"

Za\u0161tita od sunca \u010desto se povezuje sa SPF-om, ali SPF prvenstveno opisuje za\u0161titu od ultraljubi\u010dastog B (UVB) zra\u010denja. Krema za sun\u010danje koja pru\u017ea sna\u017enu UVB za\u0161titu ne pru\u017ea automatski odgovaraju\u0107u za\u0161titu od ultraljubi\u010dastog A (UVA) zra\u010denja. Zbog toga europske smjernice za kreme za sun\u010danje pridaju posebnu va\u017enost uravnote\u017eenoj za\u0161titi od UVB i UVA zra\u010denja. Proizvo\u0111a\u010di…<\/p>\n","protected":false},"author":294,"featured_media":36811,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4148],"tags":[],"class_list":["post-36810","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-laboratorijsko-ispitivanje"],"yoast_head":"\nObja\u0161njenje standarda testiranja UVA-e - Certified Cosmetics<\/title>\n<meta name=\"description\" content=\"Saznajte kako funkcionira UVA testiranje kozmetike u EU, uklju\u010duju\u0107i UVA-PF, ISO 24443, kriti\u010dnu valnu duljinu, metode testiranja i tvrdnje o kremama za sun\u010danje.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.certifiedcosmetics.com\/hr\/blog\/laboratorijsko-ispitivanje\/objasnjenje-standarda-testiranja-uva-e\/\" \/>\n<meta property=\"og:locale\" content=\"hr_HR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Obja\u0161njenje standarda testiranja UVA-e\" \/>\n<meta property=\"og:description\" content=\"Saznajte kako funkcionira UVA testiranje kozmetike u EU, uklju\u010duju\u0107i UVA-PF, ISO 24443, kriti\u010dnu valnu duljinu, metode testiranja i tvrdnje o kremama za sun\u010danje.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.certifiedcosmetics.com\/hr\/blog\/laboratorijsko-ispitivanje\/objasnjenje-standarda-testiranja-uva-e\/\" \/>\n<meta property=\"og:site_name\" content=\"Certified Cosmetics\" \/>\n<meta property=\"article:published_time\" content=\"2026-11-04T19:08:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.certifiedcosmetics.com\/wp-content\/uploads\/2026\/07\/uva-protection.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Angela\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisao\/la\" \/>\n\t<meta name=\"twitter:data1\" content=\"Angela\" \/>\n\t<meta name=\"twitter:label2\" content=\"Procijenjeno vrijeme \u010ditanja\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minuta\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/hr\\\/blog\\\/laboratorijsko-ispitivanje\\\/objasnjenje-standarda-testiranja-uva-e\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/hr\\\/blog\\\/laboratorijsko-ispitivanje\\\/objasnjenje-standarda-testiranja-uva-e\\\/\"},\"author\":{\"name\":\"Angela\",\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/hr\\\/#\\\/schema\\\/person\\\/2620f9d56cb0c867784edb68de06746c\"},\"headline\":\"Obja\u0161njenje standarda testiranja UVA-e\",\"datePublished\":\"2026-11-04T19:08:45+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/hr\\\/blog\\\/laboratorijsko-ispitivanje\\\/objasnjenje-standarda-testiranja-uva-e\\\/\"},\"wordCount\":1424,\"publisher\":{\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/hr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/hr\\\/blog\\\/laboratorijsko-ispitivanje\\\/objasnjenje-standarda-testiranja-uva-e\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/uva-protection.jpg\",\"articleSection\":[\"Laboratorijsko ispitivanje\"],\"inLanguage\":\"hr\",\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/hr\\\/blog\\\/laboratorijsko-ispitivanje\\\/objasnjenje-standarda-testiranja-uva-e\\\/\",\"url\":\"https:\\\/\\\/www.certifiedcosmetics.com\\\/hr\\\/blog\\\/laboratorijsko-ispitivanje\\\/objasnjenje-standarda-testiranja-uva-e\\\/\",\"name\":\"Obja\u0161njenje standarda testiranja UVA-e - 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