[article]
| Titre : |
Factors influencing efficacy of oil-dipersed physical sunscreens |
| Type de document : |
texte imprimé |
| Auteurs : |
Julian P. Hewitt, Auteur ; John Woodruff, Auteur |
| Année de publication : |
2000 |
| Article en page(s) : |
p. 18-23 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.5 Parfums et cosmétiques |
| Résumé : |
Introduction :
Inorganic oxides are now well-established as active components for sunscreen products. Titanium dioxide (TiO2) has proven to be an effective UVB attenuator, facilitating formulation of high SPF products with a single sunscreen active. Zinc oxide complements TiO2 in that, while it has relatively low efficacy in the UVB, it attenuates well into the UVA region, providing broad spectrum protection.
These physical sunscreens are available as hydrophobic or hydrophilic powders, or as oil-based or water-based dispersions. They can therefore be incorporated into almost any form of sun protection product; in emulsions, the most common form, TiO2 and/or ZnO can be incorporated into either the oil phase or the water phase of the emulsion. This paper is concerned with the factors which influence the efficacy of titanium dioxide, when incorporated into the oil phase of a sunscreen emulsion. |
| Note de contenu : |
- Theoretical background
- Particle size distribution
- Coating of the particle
- Powder or dispersion?
- The influence of formulation |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10842 |
in IFSCC MAGAZINE > Vol. 3, N° 1 (01-02-03/2000) . - p. 18-23
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