Q: How do you undercut medium length hair so it curls under?
A: The principles behind undercutting are the same regardless of the length of the finished hairstyle. The hair is cut so that the outer
layers of hair are left slightly longer than the layers that lie closer to the scalp, which encourages the hair to curve toward the shorter lengths.
The easiest way to accomplish this is to section the hair and work with small increments left
hanging down as you cut it. Each subsequent increment should be cut just slightly longer than the previous increment. Be sure to use no
tension on the hair to prevent pulling the hair and stretching it. If the hair is stretched, then the cut will be uneven and the finished results will not be as desired.
You should also pay close attention to the hairís natural wave pattern, and when possible, use the
hairís own wave to emphasize the under-curl. At the very least, you should avoid trying to create a curl under effect against the hairís natural wave.