PA Retention (40 mins, 80 mins, 2 hrs, 4 hrs, 8 hrs)

PA retention is an important measure of a sun protection product's ability to maintain its efficacy against UVA radiation even after exposure to water. It is essential to test the product's PA retention at various time points to ensure the product's performance and provide accurate information to the consumers about the duration of protection. 
 
Our clinical testing service performs in vitro tests to evaluate the product's PA retention after water immersion at various time points, including 40 minutes, 80 minutes, 2 hours, 4 hours, and 8 hours. This testing provides cosmetic companies with reliable scientific evidence to claim water-resistant and long-lasting protection against UVA radiation in their product labelling. 
 
PA retention is a crucial factor for people who spend extended periods outdoors, especially while swimming or participating in water sports. This testing ensures that the product provides adequate protection even after exposure to water, ensuring consumer satisfaction and safety.