Darning is a sewing technique used to repair holes or worn areas in fabric. In denim repair, darning is a specialized technique used to reinforce and repair damaged areas in the fabric. The process involves weaving new threads into the existing fabric using a darning sewing machine, creating a seamless repair that blends in with the surrounding fabric. A darning sewing machine, also known as a free-motion embroidery machine or a darning foot, is a specialized sewing machine that allows the operator to move the fabric freely while sewing. This makes it possible to create intricate patterns and weaves in the fabric, allowing for a seamless and visually appealing repair. To carry out darning repairs on denim, the damaged area can be stabilized with a patch or stabilizer to prevent further tearing or damage althought it is not necessary. The darning machine operator then threads the machine with a thread that matches the color and thickness of the existing fabric and starts weaving the new threads into the damaged area. The weaving pattern depends on the extent and location of the damage, and the desired outcome. For example, in the case of a small hole, the operator may use a simple back-and-forth stitch to fill in the hole, while for a larger worn-out area, a more complex weave pattern may be used to reinforce the fabric and create a seamless repair. Darning can be a time-consuming process that requires a high level of skill and attention to detail. However, when done correctly, it can be an effective way to repair damaged denim and extend the life of your favorite jeans.