The printing of engravings required a specialized “rolling press,” so-named because a plank, carrying an inked copper plate together with a sheet of paper, passed through the press by means of rollers. Initially, regional craft traditions determined the mapmaker’s choice between the intaglio process of copperplate engraving and the relief process of the woodcut, but, by the mid-16th century, the malleable metal predominated. Copper could be hammered into large plates, more finely incised, and more readily revised. The resulting detailed engraving produced a commodity that appealed to the tastes of the increasing number of customers with the interest, knowledge, and money to purchase maps.