12.3 Shaping and Buffing the Natural Nail

Shaping and buffing are two of the four parts of the outline's basic manicure/pedicure item. Shaping decides the line of the free edge. Buffing changes the surface of the plate. Both remove keratin, so both can damage a nail that was healthy when the client sat down. The shapes, grits, and methods below are standard nail-technology instruction. Pennsylvania Chapter 7 does not set a shape, a grit, or a buffing rule.

The five basic shapes

Choose the shape from the shape of the hand and fingers, the outline of the nail bed and cuticle area, the client's work, and the client's request. A client who types all day or handles boxes is usually better served by a shorter squoval or round edge than by a long pointed one. Trend shapes such as almond, stiletto, and coffin are usually built with enhancements, because a natural plate seldom has the strength to hold them.

Toenails are the exception to choosing by style. They are clipped about even with the end of the toe and filed straight across, with only the sharp corner softened. A rounded toenail corner can grow into the lateral fold.

How to file

1. If the nail is much longer than the client wants, clip it first, leaving a little extra length for filing.
2. Choose a medium abrasive of about 180 to 240 grit for the natural nail. A coarse file below about 180 grit is for product, and on a bare plate it removes keratin too fast and leaves heat and ridges.
3. File in one direction, from the sidewall toward the center, lifting the file at the end of each stroke. Then file the other side toward the center. A back-and-forth sawing stroke separates the layers of the plate and leaves a frayed edge that peels.
4. Keep the corners seated on the nail bed. Filing deep into the sidewall weakens the nail and invites a crack or, on a toe, an ingrown edge.
5. Lightly smooth the underside of the free edge to remove rough fibers, without filing up into the hyponychium.
6. Check symmetry from the client's view and from the palm side, nail by nail and across the hand.

File before the soak. A water-softened plate frays and splits under an abrasive.

Buffing

Buffing is optional. Use it to give a natural nail shine without polish, to smooth a shallow vertical ridge before color, or to remove surface shine before a product that requires it. It does not repair a split, a deep groove, or a matrix injury. A deep ridge is filled with a ridge-filler base coat in the polish step, not ground down toward the bed.

Standard tools are a block buffer with sides of different grits, used from the coarser side to the finest shine side, and a chamois buffer used with a buffing paste or buffing cream, which carries fine abrasive particles. Use light strokes in one direction, lift the buffer often, and keep the buffer moving across the plate.

Friction heat is the warning sign. If the client says the nail feels warm or hot, stop or lighten at once. Heat means layers are coming off fast, and it can burn the nail bed. Over-buffing thins the plate, so the nail bends, peels, and stains. Buff a natural nail only as much as the result needs. Before an enhancement, remove only the surface shine.

After buffing, brush the dust off the plate. Dust left on keratin blocks polish and enhancement bonding.

Single-use limits

A block buffer is abrasive and usually cannot be disinfected, so it is single-use and goes into the covered waste container after the client. A chamois is porous; use a disposable chamois cover or a buffer that can truly be cleaned and disinfected, or treat it as single-use. A metal or glass file can be reused only if it can be cleaned and disinfected under § 7.92.

Scenario: a ridge, a long nail, and a warm buffer

A client with long, thin nails asks for pointed tips and a high shine. The nail beds are narrow, but the client types for work and has broken two nails this month. Suggest an oval that keeps more strength, and the client agrees. Clip the extra length, file each side toward the center with a 180-grit file, check the shape from both sides, and smooth the underside. One nail has a shallow ridge. Buff it lightly with the fine side of a new block buffer, and stop when the client reports warmth. Brush away the dust, discard the buffer, and plan a ridge-filler base coat.