Abstract
Roughly speaking, color reproduction of paper-based prints depends on the reflection of paper and the selective absorption of transmitted light of ink. As it is quite difficult to separate the ink layer from the paper completely, the thickness and transmittance of the ink layer cannot be measured accurately, and there is no precise model to represent the transmittance of ink layer of the prints so far. In this study, a single color solid print is treated as a bilayer model, composed of paper and single color solid ink printed on a transparent film, by ignoring the ink penetration in paper. At first, the transmission haze measurement is introduced to quantify the scattering character of the ink layer and the paper. Secondly, the transmitted light of the top layer medium is decomposed into collimated light and scattered light. Lastly, by superpostioning the collimated light and scattered light to the transmittance of the paper, the transmittance model of the bilayer medium composed of paper and single color solid ink printed on a transparent film was established. By comparing the predicted data of the proposed model, and the hitherto predicted data using Kubelka model with the measured data on various print samples, it is proved that the proposed model is much more precise than Kubelka model for transmittance prediction.
