纸张的表面性能是印刷工艺中一项很重要的指标，它包括白度、平滑度、光泽度等。
The surface properties of paper printing technology in a very important indicator, which includes brightness, smoothness, gloss.
在防伪印刷纸张质量检测系统中，纸张防伪水印的模糊是其检测的重要指标之一。
The blurring of security watermark is one of the important indicators in the quality inspection system of security printing.
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