blackwork

thumb|Counted stitch blackwork, 1530s (left), and free stitch blackwork, 1590s (right).

Blackwork, sometimes historically termed Spanish blackwork, is a form of embroidery generally worked in black thread, although other colours are also used on occasion, as in scarletwork, where the embroidery is worked in red thread. Most strongly associated with Tudor period England, blackwork typically, though not always, takes the form of a counted-thread embroidery, where the warp and weft yarns of a fabric are counted for the length of each stitch, producing uniform-length stitches and a precise pattern on an even-weave fabric. Blackwork may also take the form of free-stitch embroidery, where the yarns of a fabric are not counted while sewing.