Recent in UV Filter (page 4 of 4)

Silicon Microspheres as UV, Visible and Infrared Filters for Cosmetics

Silicon microspheres are described as UV, visible and infrared (IR) radiation filters. Parameters of these spheres including shape, smoothness, refractive index and size are examined for their potential benefits in cosmetic formulations. Finally, the ability of the spheres to block IR radiation is evaluated for thermo-regulatory effects.

Meeting the UVA Challenge: Inorganic-only Sun Protection

The production of a range of titanium dioxide-based dispersions is explored to provide enhanced UVA protection, in comparison with ultrafine titanium dioxide. Formulations containing these dispersions as the only active are shown to achieve a UVA protection factor that is 1/3 of the labeled SPF value, thus meeting European Commission recommendations.

Comparatively Speaking: UVA vs. UVB Protection

Tony O’Lenick asks industry expert Dennis Lott of Florida Suncare Testing Inc. to distinguish between UVA and UVB radiation to explain how organic UV filters can be formulated into sunscreens to help protect against these rays.

English Ivy Nanoparticles Found to Protect Skin from UV Radiation

Researchers at the University of Tennessee report that English ivy nanoparticles may protect skin from UV radition better than other metal-based nanoparticles such as titanium dioxide (TiO2).

Hydroxyapatite UV Filter

Kalichem Italia S.r.l. has introduced a physical sunscreen that imparts a soft focus antiaging effect without a white appearance on skin. The material is based on hydroxyapatite, one of the basic constituents of bones and teeth.

Micron-sized Zinc Oxide Dispersion for Transparent High SPF Formula

Regulatory bodies require quantifiable, photostable UVA protection for sunscreens and while zinc oxide provides an effective option, historically, its white appearance on skin has limited its acceptance. Therefore, in the present article the authors explore a micron-sized zinc oxide dispersion technology to enable the formulation of transparent yet full spectrum sunscreen formulas.

Singlet Quenching Proves Faster is Better for Photostability

The faster a photostabilizer works, the fewer opportunities for destructive chemical reactions. Here, the author describes a new photostabilizer, ethylhexyl methoxycrylene, which acts by quenching the singlet excited state of UV filters. The data shows how this material sets a new standard for the photostabilization of avobenzone, even in the presence of octyl methoxycinnamate.

Broad-spectrum Hydroxyphenyltriazine Filter for EU

The UV filter is based on hydroxyphenyltriazine chemistry for UVA and UVB protection in beach and daily wear products.

Chitin Nanofibrils for Improved Photoprotection

Chitin nanofibrils (CN) are capable of interacting with cosmetic actives by binding to the stratum corneum, thus influencing their thermodynamic activity. Here, the authors test various sunscreen samples and determine that the addition of CN provides an interesting boost to the photoprotective activity of sunscreens.

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