{"organism":"Page","children":[{"organism":"Container.Raw","children":[{"organism":"Metadata","model":{"title":"Het getal 50","text":"\u003Cp\u003EHet smeerseizoen loopt bijna op zijn einde. In menig strandtas en badkamerkast duiken de laatste tubes zonnebrandcrème op. Maar hoe werkt die beschermingsfactor eigenlijk en waar is het van gemaakt? De reis van de Sun Protection Factor (SPF) begint op een bergtop. \u003C/p\u003E\r\n\r\n\r\n","links":[{"name":"Lees meer over het getal","value":"https://www.shell.nl/over-ons/nieuws/venster/shell-venster-2025/het-getal-50.html"}],"image":{"src":"https://www.shell.nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/_jcr_content/root/metadata.shellimg.jpeg/1756397205404/netherlands-venster-2808-hetgetal-169-final.jpeg","height":2700,"width":4800},"date":"2025-08-28T12:44:00.000Z"},"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/metadata"},{"organism":"ContentOwner","model":{},"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/contentowner"},{"organism":"Container.Header","children":[{"organism":"Container.Raw","ref":"https://www.shell.nl/about-us/_jcr_content/root/header/inherited.model.json","model":{},"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/header/inherited"},{"organism":"Breadcrumb","model":{"links":[{"name":"Home","value":"https://www.shell.nl/"},{"name":"Over ons","value":"https://www.shell.nl/over-ons.html"},{"name":"Nieuws","value":"https://www.shell.nl/over-ons/nieuws.html"},{"name":"Shell Venster","value":"https://www.shell.nl/over-ons/nieuws/venster.html"},{"name":"Shell Venster 2025","value":"https://www.shell.nl/over-ons/nieuws/venster/shell-venster-2025.html"},{"name":"Het getal 50","value":"https://www.shell.nl/over-ons/nieuws/venster/shell-venster-2025/het-getal-50.html"}]},"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/header/breadcrumb"}],"model":{},"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/header"},{"organism":"Container.Main","children":[{"organism":"Container.Section","children":[{"organism":"PageHeader.Date","color":"inherited","model":{"title":"Het getal 50","text":"\u003Cp\u003EHet smeerseizoen loopt bijna op zijn einde. In menig strandtas en badkamerkast duiken de laatste tubes zonnebrandcrème op. Maar hoe werkt die beschermingsfactor eigenlijk en waar is het van gemaakt? De reis van de Sun Protection Factor (SPF) begint op een bergtop. \u003C/p\u003E\r\n","image":{"src":"https://www.shell.nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/_jcr_content/root/main/section/page_header_copy.shellimg.jpeg/1756396658396/netherlands-venster-2808-hetgetal-breed.jpeg","alt":"Het getal 3,2 (Beeld: Jelle Hoogendam)","height":939,"width":2835},"date":"2025-08-28T12:44:00.000Z"},"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/main/section/page_header_copy"},{"organism":"Author.Info","color":"inherited","model":{"text":"\u003Cp\u003E\u003Cb\u003ETekst:\u003C/b\u003E Kirsten Gesink. \u003Cb\u003EBeeld:\u003C/b\u003E Jelle Hoogendam.\u003C/p\u003E\r\n\r\n\r\n\r\n\r\n","links":[{}],"image":{"src":"https://www.shell.nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/_jcr_content/root/main/section/author_copy.shellimg.jpeg/1756397335591/het-getal.jpeg","alt":"Het getal 3,2 (Beeld: Jelle Hoogendam)","height":1080,"width":1080}},"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/main/section/author_copy"},{"organism":"Container","children":[{"organism":"PromoSimple.Text","color":"inherited","colspan":8,"model":{"text":"\u003Cp\u003EEind jaren dertig verbrandt de jonge chemicus en bergbeklimmer Franz Greiter op de 3312 meter hoge Piz Buin, in de oostelijke Alpen. Terug in het lab ontwikkelt hij een crème met beschermingsfactor 2: de ‘Gletscher Crème’. De formule groeit uit tot de wereldwijde SPS-standaard in huidbescherming. Wat begint als een product voor bergbeklimmers, is nu onmisbaar in elke strandtas.\u003C/p\u003E\r\n\u003Ch3\u003EZweten of zwemmen\u003C/h3\u003E\r\n\u003Cp\u003EDe SPF-classificatie wordt de meetlat om bescherming tegen de zon te kwantificeren. Het getal is een vermenigvuldigingsfactor: als je zonder bescherming na 10 minuten zou verbranden, dan beschermt SPF 50 je theoretisch 50 × 10 = 500 minuten. Dan moet je niet teveel zweten of zwemmen en wel precies 2 miligram crème per vierkante centimeter huid gebruiken. Dat staat ingewikkeld op een tube zonnebrandcrème – elke twee uur smeren is het conservatieve en begrijpelijke equivalent.\u003C/p\u003E\r\n\u003Ch3\u003EKoolstof of mineralen\u003C/h3\u003E\r\n\u003Cp\u003EVeel crèmes gebruiken slimme moleculen die UV-straling absorbeert en omzet in warmte. Deze zogeheten UV-filters worden gemaakt van organische koolstofverbindingen, die op hun beurt uit ruwe olie komen. Andere crèmes halen hun kracht uit natuurlijke mineralen, zoals zinkoxide en titaniumdioxide, die werken als een soort spiegel die UV-stralen reflecteert en absorbeert. Heb je je crème in mei geopend en is hij nog niet op? De beschermingsfactor blijft doorgaans tot twaalf maanden na opening actief – daarna neemt de werking langzaam af. Het laatste restje maar beter opmaken dus, tijdens die laatste zomerstralen.\u003C/p\u003E\r\n\u003Cp\u003E\u003Csub\u003E\u003Cb\u003EBronnen:\u003C/b\u003E\u003C/sub\u003E\u003C/p\u003E\r\n\u003Cul\u003E\r\n\u003Cli\u003E\u003Csub\u003E\u003Ca href=\"https://www.greelane.com/nl/geesteswetenschappen/geschiedenis--cultuur/suncreen-history-1992440/\"\u003EDus wie heeft zonnebrandcrème uitgevonden?\u003C/a\u003E\u003C/sub\u003E\u003C/li\u003E\r\n\u003Cli\u003E\u003Csub\u003E\u003Ca href=\"https://binnenstebuiten.kro-ncrv.nl/buitenleven/alles-wat-je-moet-weten-over-zonnebrandcreme-van-spf-tot-uv-straling\"\u003EAlles wat je moet weten over zonnebrandcrème; van SPF tot UV-straling | BinnensteBuiten\u003C/a\u003E\u003C/sub\u003E\u003C/li\u003E\r\n\u003C/ul\u003E\r\n"},"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/main/section/simple/text_copy"}],"colspan":8,"model":{},"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/main/section/simple"},{"organism":"Container","children":[{"organism":"PromoSimple","color":"brand1-solid","model":{"title":"Lees ook!","text":"\u003Cp\u003EHet getal 3,2 in zonnepanelen\u003C/p\u003E\r\n\r\n\r\n","links":[{"name":"Over het getal 3,2","value":"https://www.shell.nl/over-ons/nieuws/venster/shell-venster-2025/het-getal-3-2.html"}],"image":{"src":"https://www.shell.nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/_jcr_content/root/main/section/simple_1236965938/promo_copy.shellimg.jpeg/1756727267154/netherlands-venster2507-hetgetal32-jellehoogendam-169.jpeg","alt":"Het getal 3,2 (Beeld: Jelle Hoogendam)","height":797,"width":1417}},"colspan":4,"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/main/section/simple_1236965938/promo_copy"}],"colspan":4,"model":{},"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/main/section/simple_1236965938"}],"model":{},"id":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50/jcr_content/root/main/section"},{"organism":"Container.Section","color":"brand1-subtle","children":[{"organism":"Container.XF","children":[{"organism":"Container.Section","color":"brand1-subtle","children":[{"organism":"PromoCard","color":"brand1","model":{"title":"Meer 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In menig strandtas en badkamerkast duiken de laatste tubes zonnebrandcrème op. Maar hoe werkt die beschermingsfactor eigenlijk en waar is het van gemaakt? De reis van de Sun Protection Factor (SPF) begint op een bergtop. ","date":"2025-08-28T12:44:00.000Z","links":[{"name":"canonical","value":"https://www.shell.nl/over-ons/nieuws/venster/shell-venster-2025/het-getal-50.html"},{"name":"hierarchy","value":"nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50"},{"name":"homeTitle","value":"Over ons"},{"name":"homeUrl","value":"https://www.shell.nl/over-ons.html"},{"name":"locale","value":"nl-NL"},{"name":"title","value":"Het getal 50 | Over ons"},{"name":"textDirection","value":"ltr"},{"name":"template","value":"base"},{"name":"contentPath","value":"/content/shell/countries/netherland/nl_nl/about-us/news/shell-venster/shell-venster-2025/het-getal-50"},{"name":"externalDisclaimerText","value":"Juridische Disclaimer Shell plc\r\n\r\nJe verlaat nu de website van Shell in Nederland.\r\n\r\nDe link die je hebt geselecteerd verwijst naar een website die niet is gecontroleerd door Shell plc of een lid van de Shell Group. De informatie en het materiaal op de gekoppelde website worden op geen enkele manier door Shell plc, noch enig ander lid van de Shell Group bevestigd, aangenomen, gecertificeerd of op enige andere manier gevalideerd. 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