Paragraph 116. Double hemstitching is very similar to the single hemstitching except that it repeats the process on the opposite side of the tiny space from which the threads are drawn.
To make this stitch, prepare the hem as for the single hemstitch (Par. 115). Hemstitch across one edge (Par. 115), then turning the material around begin on the other edge of the drawn threads where there is no hem turned and hemstitch across catching up the same groups of threads that you did when stitching across the first time. See Figure 15.
This may be varied by taking half the threads in one group and catching them in with half the threads in another group. It will thus give a sort of V shaped appearance to the hemstitching.
Double hemstitching may be used in any place where single hemstitching would be appropriate. (See Par. 115.)