Formulating inorganic-only sunscreen systems to meet global UVA protection requirements
JULIAN P. HEWITT
Croda Sun Care & Biotechnology, Foundry Lane, Ditton, Widnes
Cheshire, WA8 8UB, United Kingdom
Abstract
The performance of inorganic-only sunscreensystems against various UVA test criteria is examined.Combinations of titanium dioxide and zinc oxide can beused to meet European, Japanese and proposed US UVArequirements, but high proportions of actives are requiredfor high SPF systems. A new grade of titanium dioxide hasbeen developed that can be used as a single activeingredient to provide high SPF and also meet EuropeanUVA guidelines.
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