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Assessment of homogeneity and UV filter skin retention

Formulators are looking to increase performance of sunscreens while reducing the concentration of filters. Complife look into this challenging issue.

Sunscreens have been used for more than a century to protect the skin against the harmful effects of ultraviolet radiation. Although the beneficial role of sunscreens in protecting the skin, there is increasing evidence of UV filters’ systemic absorption and environmental repercussions. Sunscreen formulators are now facing the challenge of increasing sunscreen performance while decreasing the UV filter concentration.

In a collaborative study with a customer we evaluated the ability of a raw material in increasing the homogeneity of application and the retention on skin of UV filters. In order to reach this goal, a preliminary study on 6 subjects was carried out using two simple and reliable techniques: UV fluorescence emission and the skin stripping technique.

The test product demonstrated a better homogeneity of application (≈50%) and a better retention on skin than the base formula containing only the UV filters. These results were confirmed by the

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Upcoming Events

in-cosmetics Korea 2022

Hall C, Coex, Seoul, South Korea
13 - 15 July 2022

PCHi China 2022

Shanghai World Expo Exhibition & Convention Center
18 - 20 July 2022

32nd IFSCC Congress

Park Plaza Hotel, Westminster
19-22 September 2022

in-cosmetics Asia 2022

BITEC Bangkok, Thailand
1 - 3 November 2022

SCS Formulate 2022

Coventry Building Society Arena
15 - 16 November 2022

8th Anti-Ageing Skin Care Conference

Royal College of Physicians, London
29 - 30 November 2022

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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