Ender Suvaci, Tümerkan Kesim, Zuhal Sapan and Chamkaur Kang present a zinc oxide powder that combines the high transparency and SPF protection of nano-sized particles with the favourable safety profile of micron ZnO.
Zinc Oxide (ZnO) is the only globally approved, natural, mineral based UV filter that provides protection against both UVA and UVB rays. Therefore, ZnO can offer great solution as a cosmetics ingredient.
However, conventional forms of ZnO, namely micron and nano sized particles, do not fully satisfy the expectations of cosmetic formulators. For example, although micron particles are safe and have no negative impact on the environment, their large size results in low surface area per mass, an unpleasant non-smooth feeling and a whitening effect on the skin.