sunscreen Archives

Woman applying sunscreen at the beach that complied with ISO 2444:2019 in vivo determination of SPF requirements.

ISO 24444:2019— In Vivo Determination of SPF

ByAlexandra Schirn April 9, 2025May 20, 2025

The introduction of an SPF (Sun Protection Factor) began in the 1930s. Austrian chemist Franz Greiter, inspired by a sunburn while climbing a mountain, developed…

Mother applying protective sunscreen on daughter's nose at beach with sunscreen adhering to SPF specifications in ISO 24442:2022.

ANSI | Cosmetics | Laboratory

ISO 24442:2022—Sun Protection Test Methods

ByAlexandra Schirn July 22, 2024June 4, 2025

While sunlight is an essential source of life and energy, it also creates major health challenges like sunburn, pigmentation, wrinkles, dermatitis, skin cancer, and aging….