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The UV protection index PA is a test coefficient used to determine the defense of cosmetics against UV rays and UVA in the sun. How to detect the sun protection index of cosmetics? Let's learn about the knowledge of sun protection index detection in cosmetics together with us in the following Weibo Cosmetics Sun Protection Index Test Report Items:Mainly includes three items: UVA Protection Index (PFA value) measurement, Sun Protection Index (SPF value) measurement, and Sun Protection Effect and Waterproof Performance measurement. Cosmetic sun protection index detection method: 1. In vitro detection method: Commonly used methods include ultraviolet spectrophotometer method and SPF tester method. Based on the properties of UV absorbers and blocking agents in sunscreen cosmetics that block UV rays, the sunscreen is applied to a special tape and irradiated with different wavelengths of UV light. The absorbance of the sample is then tested, and the sunscreen effect of the product is directly evaluated based on the test values &Nbsp; 2. Human body testing method: The SPF human body testing method is currently a commonly used testing method. The general test site is selected between the back, waist, or shoulder line, and the skin on the back of the subject is divided into three zones: the first zone is directly irradiated with ultraviolet light; Apply sunscreen test samples in Zone 2 and then apply ultraviolet radiation; Apply SPF standard reference substance to the third zone and then undergo ultraviolet radiation. The dose of ultraviolet radiation increases gradually during irradiation, and the irradiated skin experiences varying degrees of delayed erythema response due to superficial vascular dilation. Exposure 16Function of testing report:1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report 2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems100% inspection and testing process:1. Telephone communication and confirmation of requirements 2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:1. The testing industry is fully covered, meeting different testing needs 2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate 4. Free initial testing, with no testing fees charged 5. Self service order delivery for free on-site sampling 6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China
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