Analyzing the Photo Stability of Cosmetics

The SUNTEST xenon arc instruments from Atlas are the international standard for determining the photostability and lightfastness of cosmetic products by the most established manufacturers and their suppliers.

Dyes and pigments can fade, and components like oils can deteriorate when subjected to light, both to direct or indirect sunlight or artificial light.

Analyzing the Photo Stability of Cosmetics

Image Credit: Atlas Material Testing Technology LLC

Analyzing the Photo Stability of Cosmetics

Image Credit: Atlas Material Testing Technology LLC

This can occur after the product has been applied, for example, in hair dyes and, in certain instances, while the product is still on the store’s shelf in retail packaging.

Hue shift, off odor, color fade or the degradation of ingredients can harm the reputation of a brand and create negative customer acceptance.

Analyzing the Photo Stability of Cosmetics

Image Credit: Atlas Material Testing Technology LLC

Analyzing the Photo Stability of Cosmetics

Image Credit: Atlas Material Testing Technology LLC

Crucially, “cosmeceutical” products with biologically active components can decrease in effectiveness, such as anti-aging products.

It is critical to measure the photostability of both the market packaging along with the cosmetic itself. The SUNTEST has also been utilized to conduct the in vitro determination of Sun Protection Factor (SPF) in sunscreens.

Atlas Solutions

Sun and light exposure investigations of cosmetic products are most effectively conducted through the use of xenon arc lamp devices that simulate the solar conditions of both artificial store light and direct or window-glass filtered daylight.

While any of the xenon arc instruments from Atlas can be utilized, the SUNTEST CPS+ and XLS+ benchtop exposure instruments are the most preferred tools for this application.

Analyzing the Photo Stability of Cosmetics

Image Credit: Atlas Material Testing Technology LLC

The SUNTEST range can be optionally furnished with a SunCool air chiller system to decrease the temperature of the test specimen, which is required for materials that are thermally labile, for example, materials that contain waxes.

The optional SunCool and SunTray for the SUNTEST CPS+ is recommended for SPF (Sun Protection Factor) in vitro investigations, in line with the ISO 24443 Determination of sunscreen UVA photoprotection in vitro and the COLIPA 2011 in vitro UVA methods.

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This information has been sourced, reviewed and adapted from materials provided by Atlas Material Testing Technology LLC.

For more information on this source, please visit Atlas Material Testing Technology LLC.

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