建立双面印刷品的色彩预测模型一直是印刷中的一个重要课题。将入射到印刷品的光根据其在垂直于印刷品中所走过的路径的不同, 将其分成四大部分, 即: 从正面油墨进入, 经过纸张, 再从反面油墨出射; 从正面油墨进入, 从纸张出射; 从正面空白区域入射, 从反面油墨出射以及直接穿过纸张。所建立的相关的模型以Kubelka-Munk四能流理论为基础, 通过对上述四部分的反射率与透射率相加便得到了整个双面印刷品的反射率与透射率。

It’s a very important problem in print to build color prediction model for recto-verso printing. We divided the incident light flux into four parts according to the difference path that the light transfer in vertical direction, that is: the light flux incident form recto oil, via paper and exit from verso oil; incidence from recto oil and exit from paper; incidence from paper and exit from verso oil; incidence from paper and exit from paper too. All the models are based on the Kubelka-Munk four-flux theory. We can get the total reflectance and transmission by adding the four parts light flux.