Pattern darning is also used as a "filling stitch" in blackwork embroidery. Restoration can be done with techniques like mending and darning. The darning needle is used in duplicate stitch (also known as Swiss darning). Buratto is an Italian needle lace made by darning on a net. Some of these techniques include "shadow" or "light" stitching, blackwork on canvas, and pattern darning. Invisible darning is appropriate for extremely expensive fabrics and items of apparel. Darning may be utilized on coarsely-woven fabrics with localized areas of damage. There are many varieties of fine darning.