This method involves placing stitches across a line which forms the base for you to attach the wefted hair. It is best applied to thick hair or curly and wavy hair. Very fine tin hair is not really suitable because the track may slip.
The free tutorial video shows us how this method is accomplished.
Four rows is usually a full had, and half a head for thickness only is usually just two rows.
https://www.youtube.com/watch?time_cont ... l-emSGYi_w
https://www.youtube.com/watch?time_cont ... ltDgWIT2CU
You use thicker thread than weave thread and embroidery thread is ideal.