Residue coating: Very fine layer of surface coating lift by incomplete processing in the non-image area of an offset plate, and which will cause scum when the plate is printed.

• 残留涂剂:柯式印版，因冲版过程处理不善，非印纹地方留下薄薄的涂层的情况。在印刷时，它会造成浮污。