California Cosmetology Written ExamNail CareMedium
A technician is selecting a nail file grit for lightly buffing and smoothing the surface of a natural nail before polish application. Which grit range is most appropriate?
- A240-grit or higher (fine)
- B60 grit or lower (very coarse)
- C150-180 grit (medium)
- D80-100 grit (coarse)
Show answer & explanationAnswer & explanation
Correct answer: A. 240-grit or higher (fine)
Fine grits of 240 or higher are used for light buffing, smoothing, and shining natural nails without removing too much of the nail plate, whereas coarser grits are reserved for artificial enhancements or aggressive shaping.
Why the other options are wrong
- B. Very coarse grit under 60 is reserved for heavy acrylic removal or reduction and would damage a natural nail.
- C. 150-180 medium grit is typically used to shape and blend enhancements, still too coarse for delicate natural nail buffing.
- D. Coarse 80-100 grit is used for shaping and reducing thick acrylic/gel enhancements, too aggressive for natural nails.
Nail File Grit Selection
File grit numbers indicate coarseness: lower numbers are coarser (for enhancements/removal) and higher numbers are finer (for natural nail smoothing and shine).
- 80-100 grit: shaping/reducing acrylic enhancements
- 150-180 grit: blending and shaping enhancements
- 240+ grit: light buffing/smoothing natural nails
Memory trick: Higher number, gentler touch — natural nails need it as such