What is the purpose of a base coat with regard to staining?

• A. To prevent pigment from staining the nail plate
• B. To strengthen nails through protein deposition
• C. To remove surface shine
• D. To change nail color permanently

Answer: (A)

Base coat provides a barrier between the nail plate and the colored polish, blocking pigments in the polish from penetrating the nail and causing staining. By sealing the nail, it keeps discoloration from dark or vibrant shades from showing through, while giving a smooth surface for even color application and helping the polish adhere. It isn’t meant to strengthen nails through protein deposition (that’s a separate treatment), nor does it permanently change nail color, and it isn’t primarily about removing shine.