What role does a dispersant play in nail polish?

A dispersant is a key ingredient in nail polish formulations, specifically designed to ensure that pigments are evenly distributed throughout the product. This is essential because many pigments can settle or clump together if not properly dispersed, leading to uneven color application and poor overall appearance on the nails.

When a dispersant is included in the formulation, it helps to separate and stabilize the pigment particles, preventing them from aggregating. This results in a smooth and uniform consistency, allowing for a consistent color and finish when the polish is applied. Proper dispersion also enhances the product's performance, ensuring that the color appears vibrant and true to the intended shade.

The other options refer to functions that are not the primary role of a dispersant. While UV absorbers may be used to protect the polish from the sun, and viscosity modifiers may change the thickness of the formula, the primary function of a dispersant is to ensure pigments are evenly spread throughout the polish for a quality finish.