A method of mending a hole in fabric by sewing a tight grid of stitches to replace a missing part of the fabric with new construction formed by the stitches. It is usually done by hand, but can also be done with a sewing machine. Hand darning employs the darning stitch. Darning also refers to any of several needlework techniques worked in darning stitches, such as pattern darning, which is a type of embroidery that uses parallel rows of straight stitches of different lengths to make geometric designs. Net darning, which is also called filet lace is a technique using stitching on a mesh fabric to imitate lace. Needle weaving is a drawn thread work embroidery technique which involves darning patterns into bare-laid warp or weft threads.