What does “SPF” really mean?

3 February 2017

Sun protection products represent a large sector of the cosmetics industry. We use sunscreen to block ultraviolet light from damaging the skin. There are two categories of UV light : UVA and UVB that we consider in terms of sunscreen.

Sunscreen products contain substances, that filter or block UV light, so-called “sun protection factor” (SPF). The SPF value indicated on sun protection products is established on the basis of in vivo tests on humans and in vitro (UVA) on PMMA plates.

J.S Hamilton laboratories offer sun products testing using solar simulators (Solar Light) and provide photo-toxicity and photo-allergy in vivo tests. We also offer a variety of tests to prove the efficacy of sunscreens and cosmetic products and their compliance with relevant European and international legislation, including challenge tests, patch-tests, safety assessments, cosmetics notification and other services. Contact us for more information on SPF testing services.



Monika Makara


T: +48 58 766 99 74

M: +48 695 112 314


Chwaszczyńska, 180
81-571 Gdynia


Save time and find easily the methods and the testing suppliers to substantiate your Cosmetics & Personal Care claims.

Don't miss our weekly newsletter

* Receive regular news of what's moving the world of preclinical and clinical testing of the Beauty industry

Save time and easily find the methods and test providers to validate your product claims.