Which part of the hairpiece is referred to as the 'concave end' when beginning to set flat pincurls?

The term 'concave end' specifically refers to the part of the hairpiece that is shaped inward, which is crucial when setting flat pincurls. The concave end allows for the hair to be wrapped around it in a way that creates a smooth, soft curl that lies flat against the head. When you start to create flat pincurls, this inward curve helps in achieving the desired curl shape and placement, ensuring that the curl follows the natural contours of the head.

In hairstyling, understanding the different sections and terms used in relation to the hair, such as concave and convex shapes, is essential for effective technique and styling results. The concave end is an important concept within this process, highlighting the significance of shaping in creating particular hairstyles.