Why is PA612 (Nylon 612) the preferred material for high-end mascara brush filaments?

PA612, also known as Nylon 612, is considered the premium material for mascara brushes for several key reasons. It offers outstanding resistance to the chemicals and solvents found in mascara formulas, preventing swelling or degradation. Its optimal balance of stiffness and flexibility allows for precise application, separating and coating lashes without irritation. Most importantly, BrushMake's PA612 filament is produced to strict cosmetic-grade standards, ensuring excellent biocompatibility and safety for direct contact with the eye area.