Reading Dürer's Burin Engraving Technique
名作解读：丢勒铜版雕刻的推刀线条
标签：丢勒, 推刀, 铜雕版, 排线, 灰阶
丢勒（Albrecht Dürer，1471–1528）的《忧郁 I》等铜雕版全用菱形推刀（burin）刻成：放大镜下线条起端浅、中段深、收刀渐出，交叉排线可达每毫米 4–5 线、三层叠压，营造九级灰阶；衣褶用平行长线、暗部用交错短线，光部靠约 0.05 mm 底墨统一调子。当代工坊临摹前先用显微摄影提取刀路方向图，再以推刀刻"渐变网格"（0.05–0.25 mm 深度梯度）练习腕力分级；推刀刻错无法补刀，线稿转印务必精确。
Albrecht Dürer's engraved plates (Melencolia I, 1471–1528) were cut entirely with the diamond-section burin: under magnification each line swells from a light start through a deep belly to a tapered exit, with crossings up to 4–5 lines per millimetre in three stacked layers for nine tonal steps; drapery runs long parallels, shadows cross-hatch, and highlights rely on a 0.05 mm plate tone. Copyists first map tool directions by photomicrography, then practise a burin "tone ladder" (0.05–0.25 mm depth grades) for pressure control—burin work cannot be corrected, so transfer the drawing precisely.