The particle size distribution of a coating formulation plays a critical role in determining the final appearance, durability, and performance of the finished surface. When particle sizes are inconsistent or oversized the resulting film may exhibit undesirable traits such as roughness, poor gloss, or inconsistent color. A carefully optimized particle size range boosts the uniformity of the coating, leading to a smoother, more aesthetically pleasing finish.

Smaller particles increase gloss by enabling a more even light reflection across the surface. Oversized particles cause diffuse reflection, Tehran Poshesh resulting in a matte or dull appearance. In high-end architectural and automotive applications, where aesthetics drive decisions manufacturers often tailor particle size distributions to achieve desired gloss levels, from high-gloss finishes to satin or matte effects.