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Pol J Cosmetol 2006, 9(2): 110-117pl,en  Titanium(IV) and zinc(II) oxides as sunscreens in suncreamsKatarzyna Błaszczyk, Jerzy Ciba, Maria Zołotajkin Katedra Chemii i Technologii Nieorganicznej Wydziału Chemicznego Politechniki Śląskiej Summary Introduction. Cosmetics with sun protection contain two types of sunscreens: chemical and physical. The former are organic substances which absorb the range of sunlight hazardous to human health and then give off energy in the form of heat. The physical sunscreens function as micro-mirrors which reflect and disperse radiation. Unlike the former, they do not penetrate the skin. The most common ones are titanium(IV) oxide, zinc(II) oxide and barium sulfate(VI). Objective. The study was aimed at determining the effect of physical sunscreens, titanium(IV) oxide and zinc(II) oxide, on the absorption of UV rays at 200-400 nm by creams. Materials and methods. The sun protection characteristics of the creams were determined spectrophotometrically. Six creams of different sunscreen supplements were tested. Result. Range of researched protective cream expands addition of physical filter 10% considerably TiO2. Conclusions. Titanium(IV) oxide can partially replace chemical sunscreens used in creams. This is very important since some researches reveal that organic substances used as chemical sunscreens may have an adverse effect on human skin. Key words: creams with sun protection, physical sunscreens TiO2 ZnO |