Which of the following is NOT a purpose of tack strip?

Tack strips serve multiple key purposes in carpet installation, primarily focused on securing the carpet in position and maintaining its structure over time. The primary functions of tack strips include holding the carpet in place, protecting the edges, and providing support to ensure a taut, well-fitted appearance.

The reason enhancing carpet color is not a purpose of tack strips is that they play no role in the aesthetic qualities of the carpet. Their design and function are purely mechanical; they grip the carpet's backing to keep it stretched and secured against the subfloor. Therefore, embellishing or modifying the appearance of the carpet, such as enhancing its color, lies outside the scope of what tack strips are intended to do. While color enhancement may be influenced by other factors like fiber type or dye processes, tack strips themselves do not contribute in any way to aesthetic improvements.