How can a technician determine if a nail product has expired?

Determining whether a nail product has expired can often be effectively done by assessing changes in color, consistency, and odor. Over time, nail products can undergo chemical changes that affect their properties. For instance, a gel polish may thicken or develop an unusual odor, or a nail polish might separate or change color from its original hue. These signs often indicate that the product has degraded and is no longer safe or effective for use.

While checking the expiration date on the container is a straightforward method, it may not always be available, as not all products have clear expiration dates printed. Customer reviews and price changes are not reliable indicators of product condition or expiration, as they relate more to consumer perceptions rather than product integrity. Therefore, the ability to visually and olfactorily assess a product's state is crucial for maintaining safety and quality in nail technology practices.