Normal summer activities put a great deal of stress upon sunscreen products, particularly water exposure through swimming and sweating. Most sunscreen products are therefore designed to be water resistant. Regulatory agencies around the world, including the US Food and Drug Administration (FDA) and the European Cosmetic, Toiletry and Perfumery Association (COLIPA), have defined protocols to assure consumers that a claim of water resistance has been substantiated. Although protocols differ around the world, they all require testing on a significant number of people, which makes the testing expensive and time-consuming. The sunscreen formulator and chemist need a rapid and cost-effective method to determine at least a comparative level of water resistance in the laboratory in order to determine project progress.
A Laboratory Method for Measuring the Water Resistance of Sunscreens
January 7, 2004 | By: Berislav Markovic, Donna Laura and Mark Rerek, International Specialty Products
Z-COTE LSA provides broad-spectrum protection from long wave UVA rays and medium wave UVB rays by physically scattering, reflecting and absorbing solar radiation.
- Zinc Oxide
- UVA, UVB Sunscreen
- UVA Protection
- UVB Protection