摘要
为了更全面地理解柔印中油墨、网纹辊、印版和承印物之间的作用关系，本研究通过实验具体分析了网纹辊网穴容积、印版与承印物间距和加网线数对油墨转移量的影响，及最终对印刷品质量的影响。这对于使柔性印刷图像更忠实于原稿，印刷品层次更加细腻，更好地控制油墨转移量有重要的意义。本研究为进一步拓宽柔性印刷的应用范围提供了一定的理论依据。
Controlling the transfer of ink to the substrate is a key requirement of the flexographic printing process. Its ability to transfer ink from the image cartier to the substrate at low pressures enables the process to be used for the production of printed matter using pressure - sensitive materials. These can range from substrates where high pressures can damage surface structure （ e. g. corrugated board）, to specialist inks, which can be damaged by the high shearing action associated with other volume print processes. This paper evaluates the effect of pressure changes on print quality for different anilox specifications and line rulings on the plate. Data collected from an experimental print trial were used to quantify the effects of anilox roll specifications, dot pitch, and plate - to - substrate engagement on the reproduction of both a continuous ink film and the formation of discrete halftone dots. The ink - carrying volume of the cells of the anilox roll was shown to have the greatest influence on solid density （a parameter used as an indirect measure of ink film thickness） and halftone dot formation ; however, the geometrical characteristics of the cells were also shown to have an effect. An initial increase in the pressure within the printing nip resulted in a significant rise in both solid density and tone gain （ growth of the halftone dots） due to improved ink transfer from the plate to the substrate. Subsequent increases in pressure produced little further increase of solid density, indicating ink transfer had reached a plateau. The rate of increase of halftone density was found to be reduced as pressure increased, which was attributed to the ink approaching its maximum capability for spreading on the substrate
出处
《中国印刷与包装研究》
CAS
2013年第2期72-76,共5页
China Printing Materials Market
