{"id":1875,"date":"2025-12-25T19:04:55","date_gmt":"2025-12-25T18:04:55","guid":{"rendered":"https:\/\/www.laboratoireslelegard.com\/?post_type=product&#038;p=1875"},"modified":"2025-12-25T19:09:56","modified_gmt":"2025-12-25T18:09:56","slug":"challenge-test","status":"publish","type":"product","link":"https:\/\/www.laboratoireslelegard.com\/en\/product\/challenge-test\/","title":{"rendered":"Challenge Test"},"content":{"rendered":"<div data-elementor-type=\"product-post\" data-elementor-id=\"1875\" class=\"elementor elementor-1875\" data-elementor-post-type=\"product\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-06bf5d0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"06bf5d0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6f2a6e1\" data-id=\"6f2a6e1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7d75f8c elementor-widget elementor-widget-text-editor\" data-id=\"7d75f8c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"w-full\"><div class=\"progressive-markdown-content\"><div class=\"w-full\"><div class=\"progressive-markdown-content\"><div class=\"content-visibility-auto\"><p>The <strong>challenge test<\/strong> is the gold standard method for verifying the actual effectiveness of a cosmetic product's preservative system. This test involves deliberately inoculating several types of microorganisms\u2014bacteria, yeasts, and molds\u2014directly into the formula. The product is then monitored for several weeks to assess the preservative's ability to eliminate these microorganisms or prevent their proliferation. The procedure is standardized and recognized by both European regulations (Regulation EC 1223\/2009) and the Swiss Cosmetics Ordinance (OCos\/OSAV), making it an essential test for marketing products in Switzerland and the European Union.<\/p><\/div><div class=\"content-visibility-auto\"><p>The challenge test replicates real-life conditions of use. Each time the bottle or jar is opened, small amounts of microorganisms from the fingers, the ambient air, or the environment of use can enter the formula. By simulating these repeated contaminations, the test verifies that the preservative system effectively protects the product against microbial growth.<\/p><\/div><div class=\"content-visibility-auto\"><p>During the observation period, samples are taken at regular intervals and analyzed microbiologically. If no multiplication is detected, the preservative is considered effective for the expected shelf life of the product. Conversely, the presence of colonies indicates that the preservative system is insufficient and requires reformulation or adjustment of the preservative concentration.<\/p><\/div><div class=\"content-visibility-auto\"><p>By confirming that microorganisms cannot grow throughout the shelf life, the challenge test guarantees that the product will remain healthy, stable, and safe even after several weeks or months of use. This proof of microbiological stability is an essential part of the <strong>safety file<\/strong> required for the constitution of the <strong>DIP\/PIF<\/strong>. It is therefore essential for any marketing in Switzerland and Europe, ensuring compliance with regulatory requirements and consumer confidence.<\/p><\/div><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Le challenge test est la m\u00e9thode de r\u00e9f\u00e9rence pour v\u00e9rifier l\u2019efficacit\u00e9 r\u00e9elle du syst\u00e8me conservateur d\u2019un produit cosm\u00e9tique. Cette \u00e9preuve consiste \u00e0 inoculer volontairement plusieurs types de micro\u2011organismes \u2013 bact\u00e9ries, levures et moisissures \u2013 directement dans la formule. Le produit est ensuite suivi pendant plusieurs semaines afin d\u2019\u00e9valuer la capacit\u00e9 du conservateur \u00e0 \u00e9liminer ces [&hellip;]<\/p>","protected":false},"featured_media":1732,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[151],"product_tag":[113,116,112,114,115,117],"class_list":{"0":"post-1875","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-analyse","7":"product_tag-activite","8":"product_tag-activity","9":"product_tag-analyse","10":"product_tag-eau","11":"product_tag-micro-organismes","12":"product_tag-water","14":"first","15":"instock","16":"shipping-taxable","17":"product-type-simple"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Challenge Test<\/title>\n<meta name=\"description\" content=\"Challenge test : v\u00e9rifie l\u2019efficacit\u00e9 du conservateur, assure s\u00e9curit\u00e9 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