Which technique is commonly used for filing acrylic nails?

One-direction filing is commonly used for filing acrylic nails because it minimizes damage to the nail structure and the acrylic enhancement. This technique involves filing in a single direction, which helps prevent the acrylic from tearing or chipping and promotes a smoother finish. Filing back and forth, or in other uncontrolled directions, can create uneven edges and increase the risk of breakage, leading to a less polished and potentially damaging result for both the natural nail and the acrylic overlay. Using one-direction filing allows for better control and precision, making it an essential technique for nail technicians working with acrylic materials.