Preservative Efficacy Testing, commonly called the Challenge Test, is a critical quality and safety requirement for cosmetic products that contain water. Water-based formulations face a constant risk of microbial contamination during storage and consumer use. PET evaluates the effectiveness of the product’s preservative system as a whole. The test confirms that the formulation can resist […]

Microbiological testing is a fundamental part of cosmetic safety and quality control. Cosmetic products, especially those that contain water, can support the growth of microorganisms if they are not properly controlled. This testing ensures that cosmetic products are free from harmful microbes and remain microbiologically stable throughout their shelf life. It protects consumer health while […]

Stability testing is a mandatory step in the development and safety assessment of cosmetic products. It evaluates how a product maintains its physical, chemical, and microbiological quality over time and under different environmental conditions. This testing confirms that the cosmetic product remains safe, effective, and visually acceptable throughout its declared shelf life and Period After […]