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Using spherical silica gels to improve sunscreen

AGC Chemicals Americas explains how recent advances in silica gel technology mean W/O (water-in-oil) sun care formulations can now be created that rival the appeal and processing ease of O/W (oil-in-water) formulations

Skincare product formulators often turn to water-in-oil (W/O) emulsions when working with inorganic sunscreen actives because of their superior sun protection factor (SPF) efficiency per unit of active. Oil-in-water (O/W) formulations have tactile aesthetic advantages but are less SPF-efficient and present formulation issues with inorganic sunscreen actives, especially zinc oxide.

W/O formulations provide better SPF efficiency in part because of the more consistent film they apply to the hydrophobic skin surface. There are other advantages as well, including the fact W/O emulsions have a degree of inherent water resistance not seen in O/W emulsions that contain hydrophilic emulsifiers.

Challenges of W/O formulations using mineral actives

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Upcoming Events

8th Anti-Ageing Skin Care Conference

Royal College of Physicians, London
29 - 30 November 2022

76th Annual Scientific Meeting & Showcase

JW Marriott LA Live, Los Angeles, California
12 - 14 December 2022

PCHi China 2023

The China Import and Export Fair Complex, Guangzhou
15-17 February 2023

in-cosmetics Global 2023 - Barcelona

Fira Barcelona Gran Via
28 - 30 March 2023

Access the latest issue of Personal Care Magazine on your mobile device together with an archive of back issues.

Download the FREE Personal Care Magazine app from your device's App store

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