Urs Graf (born c. 1485 in Solothurn, Switzerland; possibly died before 13 October 1528) was a Swiss Renaissance goldsmith, painter and printmaker (of woodcuts, etchings and engravings), as well as a mercenary soldier. He only produced two etchings, one of which dates from 1513 – the earliest known etching for which a date has been established. However, his woodcuts are considered of greater significance, particularly as he is attributed with the invention of the white-line woodcut technique, where white lines create the image on a black background. He also produced a few engravings, including copies of works by Martin Schongauer and Albrecht Dürer. He produced innovative drawings intended as finished works of art rather than just studies.
Source: Wikipedia, "Urs Graf", available under the CC-BY-SA License.