A process of etching capable of producing several tones by varying the etching time of different areas of a copper plate so that the resulting print resembles the flat tints of an ink or wash drawing.

• 细点腐蚀制板法一种蚀刻法，通过改变铜版不同区域的蚀刻时间可产生多种色度，以致使印迹类似于墨水画或淡彩画的无明暗之分的色度