What is the process called when acrylic product is applied to new nail growth?

The correct answer is "A fill" because this term specifically refers to the application of acrylic product to the area of new nail growth. When natural nails grow, the acrylic material can begin to separate from the nail bed at the cuticle area, creating a gap. A fill involves applying additional acrylic in this area to maintain the appearance and structural integrity of the nail enhancement, ensuring it looks neat and professional.

The other terms, while often used informally in the industry, do not accurately represent the process in the same way that "fill" does. "Refill" and "fill-in" are sometimes used interchangeably but are less precise, and "fill-up" is not a recognized term in nail care practices. Understanding the correct terminology is important for effective communication and practice in the field of nail technology.