What role does a cross-linker play in nail products?

A cross-linker plays a crucial role in the formulation of nail products, particularly in creating stronger and more durable materials. By joining different polymer chains together, cross-linkers enhance the structural integrity of the product. This bonding process increases the resilience and flexibility of the finished nail enhancements, making them less prone to chipping or breaking.

In contrast, the other options describe functions related to nail products but do not pertain to the specific role of cross-linkers. The addition of color in nail polish is primarily achieved through pigments and dyes, while solvents are used to dissolve adhesives or paint, facilitating application and drying. The enhancement of shine on nail surfaces typically relies on other additives like topcoats or specific finishing agents, rather than cross-linking substances. Thus, the function of joining polymer chains is central to understanding the practical benefits of cross-linkers in nail technology.