Colorado Cosmetology Written Practice Exam

When creating round concave layers, it is important to understand that the finger position refers to the angle at which the fingers are held while cutting. As such, the correct finger position for creating round concave layers is parallel to the subsection.

Option A (diagonal to the subsection) and Option B (perpendicular to the subsection) would result in a different angle and therefore not achieve the desired round concave layers.

Option D (vertical to the subsection) would result in a straight, vertical cut and not achieve the desired round shape.

Overall, the key to achieving round concave layers is using a parallel finger position to the subsection.