A label that ensures a booster effect of the Water Resistance
Nowadays, sunscreen products are more and more efficient with an increased willingness of consumers to keep effective protection in all circumstances (swimming, sports, etc.) against harmful UV rays. Thus, some products are Water Resistant and generally boosters have become popular for improving this resistance to aqueous stress while adding properties of interest to the skin. In addition, their effectiveness allows a normal level of use in formulations of 1 to 3% on an active basis.
Although they can significantly increase this water resistance efficiency depending on the formulation and types of sunscreen used, a wide range of raw materials has been developed and it is difficult to make clear distinction between a true and a false “Water Resistance Booster”.
EXAMPLE OF THE MODE OF ACTION OF "WATER BOOSTER"
+ Texturizing agents
+ Film-forming agents
+ Hydrophobic agents
+ Dispersing or solubilizing agents
+ Encapsulation technologies
Therefore, SUNCERT proposes to certify the raw materials claiming a “Water Resistant Booster” effect.
For this, the following criteria shall be respected:
Results, using a placebo and a dose effect, demonstrating:
– improvement of the Water Resistance of at least 10% and at a minimum of 5 points by using ingredient at the first concentration (generally ≤ 5%),
– improvement of the Water Resistance of at least 20% and at a minimum of 10 points by using ingredient at the second concentration (generally ≤ 10%).
The results with submission of the reports shall be evaluated in two different laboratories using:
– In Vivo method (minimum 5 valid human volunteers).
An absorbance curve demonstrating minimal absorbance of the ingredient in UV with information on E (1; 1) at λmax.
A description of how this MP works.