Resistance to Friction
There is a general trend towards the use of appropriate protective and preventive measures, thanks to growing global campaigns to raise awareness of sun protection. To this end, the best options are UV-blocking fabrics and sun protection products. Beyond the static sun protection performance provided by sun protection products against UV radiation, photoprotection is put to the test by consumers in real-life conditions of use such as resistance to water, sweat, etc.
However, no standardized or harmonized in vivo or in vitro method is available today for assessing the rub resistance of a textile such as a fabric, garment or towel.
To determine and substantiate this claim of product efficacy, WENEOS has developed an exclusive in vitro method involving the measurement of a sun protection factor (SPF) before and/or after a rubbing step using a fabric.
days for an in vitro study with a final report
solar studies carried out
%
compliance with solar standards
CLAIM
We can assess the sun protection of your products in full compliance with official methods, or claim the properties of your products through exclusive tests developed by WENEOS.
In vitro sand resistance
WENEOS a développé une nouvelle méthode in vitro pour déterminer de manière fiable la résistance au frottement des produits solaires à travers des conditions spécifiques (textile, pression et mouvement). Le facteur de résistance au frottement qui en résulte indique si un écran solaire est toujours efficace après avoir été frotté avec un textile (serviette, chiffon, etc.).
(réf. HeRUB)
Méthode publiée : Supporting Claims for « Rub-Resistant » Sun Protection – E. Delamour, S. Miksa, D. Lutz and C. Guy, Cosmetics & Toiletries, April 2016
Control
To optimize your suncare products or check their quality, we offer you exclusive tests developed by WENEOS.
Comparison of in vitro signal absorbance measurements with resistance (batch, aging, etc.)
The statistical comparison method makes it possible to compare two sun protection products in terms of ageing, batch, benchmark, etc. When checking the absorbance spectrum between a reference and a test product using an in vitro method, two important rules must be observed. First of all, compare the two products at the same time and under the same conditions, to limit measurement variability. Secondly, a three-step verification based on absorbance values, including comparison of curve shape, variability and intensity.
In this method, a specific step for comparing the resistance of the two products can be added, such as water resistance, friction resistance, etc.
(ref. HeCOMP-2)
Published method : *In vitro comparison - A new accessible and reliable statistical method to compare the global UV protection properties of cosmetics - Lutz and S. Miksa, H&PC Sun Care, July/August 2013 | *Sunscreen products: Some practical applications for a new comparison test method to help Development and ensure Quality Controls - D. Lutz, S. Miksa and C. Guy, H&PC Today, November/December 2014
Discover the analyses additionalfor all-round sun protection
UV protection
- SPF – UVB
- FPUVA – UVA
- UVA:UVB ratio
- Photostability
- Absorbance spectrum
Beyond UV
- Ultra-Long UVA
- Blue Light
- Visible
- Infrared
- Full Spectrum
- UVC
Resistance
- Water resistance
- Sweat resistance
- Sand resistance
- Rub resistance
- Wet Skin Application
- Extreme conditions
- Persistence | Long-lasting
- Immediate protection