Which of the following supplies is NOT needed to remove hard UV gel nails?

To understand why the choice indicating the soak-off solution is not needed to remove hard UV gel nails, it's important to recognize what hard UV gels are and how they differ from other nail products. Hard UV gel nails are designed to be more durable and typically require a different removal process compared to soak-off gels.

Hard UV gels generally need to be filed down and are often removed by buffing or using a file to break the seal and reduce the thickness of the product itself. Once you have filed away a significant amount, scrapers can sometimes be used to assist in the removal. Therefore, files and scrapers are essential tools in this process.

In contrast, soak-off solutions are specifically formulated for softer gels that are designed to dissolve in a solution. They are commonly used for gel polishes rather than hard UV gels. Since hard UV gel nails do not dissolve in a soak-off solution, this makes the soak-off solution unnecessary for their removal.

The other supplies—polish remover, files, and scrapers—are standard items used in the removal of hard UV gel nails, providing the necessary means to effectively remove the product without relying on a dissolving method.