目的 旨在系统比较不同类型镭射纸表面周期性微纳结构的差异,揭示其对纸张表面特性及印刷颜色再现性能的影响规律,为镭射纸的合理选型与印刷工艺优化提供依据。方法 针对彩虹光柱镭射纸、铂金光柱镭射纸、铂金哑光柱镭射纸3种典型的镭射纸,以铜版纸为对照,采用金相显微镜、激光共焦显微镜对其表面微结构进行观察分析,同时对其平滑度、光泽度、粗糙度等表面特性进行测试对比,采用印刷打样测试印刷样张油墨实地密度进而计算色偏、灰度和呈色效率并绘制GATF圆形色域图,分析不同微观结构的镭射纸色彩再现性能。结果 实验结果表明,不同微观结构的镭射纸对光的反射、衍射等作用不同,在色偏、灰度以及呈色效率上会有不同的表现,影响色彩再现能力。结论 通过对3种典型镭射纸与铜版纸的表面微结构、表面特性及印刷颜色再现性能进行系统对比,揭示了镭射纸表面微观结构差异及其光学效应是导致表面性能变化和印刷色域缩小、色偏增大的主要原因,可为镭射防伪行业提供一定的理论参考。
Abstract
The work aims to systematically compare the differences in periodic micro/nano structures on the surfaces of different types of laser paper and reveal their impact on paper surface characteristics and printing color reproduction performance, to provide a basis for the rational selection and printing process optimization of laser paper. Regarding three typical types of laser paper, namely rainbow beam laser paper, platinum beam laser paper, and platinum matte beam laser paper, ordinary copperplate paper was used as a control. The surface micro structures of the above paper were observed and analyzed with a metallographic microscope and a laser confocal microscope. At the same time, the surface characteristics such as smoothness, glossiness, and roughness were tested and compared. Printing samples were used to test the ink density, thereby calculating the color deviation, grayscale, and color rendering efficiency. GATF circular color gamut maps were drawn to analyze the color reproduction performance of laser paper with different micro structures. The experimental results showed that laser paper with different micro structures had different effects on light reflection, diffraction, etc., and had different manifestations in color cast, grayscale, and color rendering efficiency, which affected the color reproduction ability. Through systematic comparison on the surface micro structure, surface characteristics, and printing color reproduction performance of three typical laser paper and copperplate paper, it is revealed that the differences in surface micro structure and optical effects of laser paper are the main reasons for surface performance changes, reduced printing color gamut, and increased color cast. This can provide a theoretical reference for the laser anti-counterfeiting industry.
关键词
镭射纸 /
微观结构 /
表面特性 /
色彩再现 /
印刷质量
Key words
laser paper /
micro structure /
surface characteristics /
color reproduction /
printing quality
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基金
湖北省自然科学基金计划项目（2025AFC107）; 湖北省教育厅科学研究计划资助项目（B2021267）; 产学研项目（HX20240082,HZ250094）
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