印版参数对凹印水性油墨印刷性能的影响分析

Effects of Printing Plate Parameters on Printing Performance of Gravure Water-based Ink

目的通过研究印版参数对凹印水性油墨印刷性能的影响,解决凹印水性油墨在应用过程中出现的圆点缺失、实地流平性不佳、细小文字发虚等印刷外观质量问题。方法通过调整网穴开口值、网角、网线等印版参数的试验方法,并结合凹印印刷原理,对印品的实地流平性、色差、圆点呈现度、文字清晰度等外观质量进行分析。结果当银色印版网穴开口值为200μm、深度52μm、针角125°时,采用银色凹印水性油墨印制的印品外观效果达到最佳,银色圆点清晰完整、不变形;在网线80 l/cm、针角130°、网穴开口值154μm、深度36μm条件下,当网角为35°时,红色印版印制的红色凹印水性油墨印品实地外观较佳,墨色均匀、边缘光洁;红色印版网线为95l/cm、深度为38μm时,采用红色凹印水性油墨印刷的细小文字线条清晰完整、不变形。结论印版参数应根据不同凹印水性油墨的特点以及印刷图案外观的要求进行相应的调整,解决因不同种油墨所带来的印刷适应性问题,才能保证印刷品外观质量的一致性。

The paper aims to solve the problems of dot missing, poor leveling in the field and falsification of small words in gravure water-based ink by studying the influence of plate parameters on the printing performance of gravure water-based ink. By adjusting the parameters of screen opening, mesh angle and mesh line, and combining with gravure printing principle, the appearance quality of printed matter such as leveling, chromatic aberration, dot presentation and text clarity was analyzed. When the opening value of the mesh cave opening was 200 μm,the depth was 52 μm and the needle angle was 130, the appearance of the silver gravure water-based ink printed on the silver plate was the best, and the silver dots were clear and intact, without distortion. Under the conditions of 80 l/cm mesh line, 130° of needle angle, 154 μm of opening value and 36 μm of depth, when the mesh angle was 35°, the red gravure water-based ink print printed by red plate was better in appearance. The ink color was uniform and the edges were smooth;when the mesh line was 95 l/cm and the depth was 38 μm, the red gravure water-based ink printed on the red printing plate had clear and complete lines and no deformation. The printing plate parameters should be adjusted according to the characteristics of different gravure aqueous inks and the appearance of the printed patterns, to solve the printing adaptability problems caused by different kinds of inks, in order to ensure the consistency of the appearance quality of the printed matter.