Scum: Trace of ink adheres to the non-image area of an offset plate due to its inability to tepel ink caused by poor desensitization or insufficient supply of damping solution.

 
  • 浮污:柯式印刷的非印纹部分沾上墨的情况。是因为润湿液不足或消感处理不善,使非印纹部份不能拒墨所致。
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