Ultra violet ray inhibitor polish or top coat is used for __________ nails.

The application of ultraviolet ray inhibitor polish or top coat primarily pertains to gel nails. Gel nails are cured under a UV or LED light, which allows the polish to harden and adhere better than traditional nail polishes. The inclusion of a UV ray inhibitor in these products is crucial because the UV light used to cure gel polish can also damage the natural nails underneath. Hence, the protector helps minimize the potential harm caused by UV exposure.

Using a UV ray inhibitor ensures that while the gel nails are being styled and enhanced, the underlying natural nails are also protected from the harmful effects of UV rays, thus promoting healthier nail growth and preventing damage during the gel application process. This makes it particularly important for gel nail applications, as they are the specific type of nails that see frequent exposure to UV light compared to others like natural, acrylic, or damaged nails.