The wood engraving, on the other hand, started with a section of dense wood of a uniform texture, usually box or maple, and with the end-grain rather than the plank as surface. For larger engravings a number of sections were mortised together. The drawing was made on the block, not in pen-and-ink although this could be done (certain types of wood engraving reproduced pen drawings) but in gray washes with a full range of tones. The engraver, using a burin similar to that employed in copper plate work, then ploughed out wood in delicate ribbons (see fig. 2). Since the surface was to receive ink, the procedure moved from black to white: the more lines taken away, the lighter the tones would appear, and, conversely, where fewest or finest lines were removed the tones would be the darkest. In the finished print the unworked surface printed black while each of the engraved lines showed as white. It was the "white line" that gave wood engraving its special quality. On the smoother end-grain it could be manipulated with extreme fineness, an impossibility with the plank side, which would tear slightly or "feather" when the burin was moved across the grain. Tones and textures approaching the scale of copper plate engraving could be created, except, of course, that the lines were white and the impressions not so brilliant. But since grays were achieved by the visual synthesis of black ink and white paper, it mattered little whether the engraved lines were black or white so long as the desired tones could be produced. [Illustration: Figure 3.--Late 15th-Century White-Line Engraving "The crowning of the Virgin," in the "dotted manner" executed on metal for relief printing. Parts were hand colored.] For purposes of realism, this was an enormous improvement over the old black-line woodcut. Natural tones and textures could be imitated. The engraver was no longer a mere mechanical craftsman cutting around existing lines; special skill was needed to translate tones in terms of white lines of varying thickness and spacing. The opportunity also existed for each engraver to work his own tones in his own manner, to develop a personal system. In short, the medium served the same purpose as copper plate line engraving, with the added virtue that it could be printed together with type in one impression. If it failed artistically to measure up to line engraving or to plank woodcut, this was not the fault of the process but of the popular reproductive ends which it almost invariably served.