胶印印刷压力对油墨转移性能的影响

目的研究不同印刷压力下CMYK四色油墨的油墨转移率的变化趋势。方法采用控制变量法对胶印印刷压力和油墨转移之间的关系进行深入研究,运用IGT C1-5印刷适性仪印刷胶版纸,印刷速度相同,在不同的印刷压力下进行实验。结果得到了CMYK 4种油墨不同印刷压力下在胶版纸上印刷的油墨转移率数据,利用Matlab软件对所得数据进行拟合,得到了印刷压力与油墨转移率的关系曲线和方程。结论油墨转移率随印刷压力的增加而显著增大,在胶版纸上印刷压力达到450 N左右时,油墨转移率最大,随后油墨转移率随着印刷压力的增加而降低。经软件分析油墨转移率和印刷压力呈五次曲线关系。

Effects of Offset Printing Pressure on Ink Transfer Performance

The work aims to research the variation trend of CMYK four-color ink transfer rate under various printing pressures. The control variable method was adopted to deeply study the relation between the offset printing pressure and the ink transfer. The offset printing paper of printability tester IGT C1-5 was used. The experiment was conducted at the same printing speed and at different printing pressures. The ink transfer rate data of the four CMYK inks on the offset printing paper under various printing pressures were obtained. By using software Matlab to simulate the data obtained, the curve of relationship between the printing pressure and ink transfer rate and the equations were obtained. In conclusion, the ink transfer rate remarkably increases with the increase in the printing pressure. When printing pressure on the offset printing paper reaches about 450 N, the ink transfer rate is the largest, and then the ink transfer rate decreases with the increase in printing pressure. Upon the analysis by the software, the printing ink transfer rate and printing pressure are in the relation of quintic curve.