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In order to study there production of UV ink-jet printing on different wood substrate. Using UV ink-jet printer, standard color patches are printed on wood substrate, wood substrate with white ink, and wood substrate with white ink and Varnish, and then the printed product color patches are measured using photometer, and then use MATLAB software program to form Color Gamut. According to the experimental data and the program running, the largest color patch in gamut is the wood substrate with white ink and Varnish. The gamut on the wood substrate of the white ink is less than the former, but significantly larger than the gamut on the untreated wood substrate. This will facilitate the flexible selection of different substrates for the printing of duplicates with different printing requirements on the wood substrate.

Because the traditional computer color matching algorithm can not give people an intuitive feeling, and the color matching process is difficult to understand, aiming at the above problems, an ink color prediction method and process were established. Firstly, the relative position of the ink color gamut in the CIEL*a*b* color space was determined by using the color gamut visualization technology. Then the position of the target color in the CIEL*a*b* color space and the ink color field was found, and the ink ratio of the target color was obtained by matrix calculation using the spectral data of the base color bar. The experimental results show that the method in this paper can meet the actual printing color requirements, and it can provide a new method for ink computer color matching.

In order to establish a more accurate Lithography database and reduce the color difference of computer color matching, the Lithographic suitability meter was used to establish a database under different conditions of substrate material, ink ratio and printing speed, so as to explore the influence of various factors on color difference in this experiment. The X-Rite Color Master was used to output color scheme to print sample strips that could produce color differences. The experimental results showed that the database created by the top part of the laser printing paper is relatively better and its color difference fluctuates around 3. The increase in the proportion of the ink not only makes the color difference smaller, but also reduces the fluctuation range of the color difference.

The environmental pollution problems cause for people’s concern in recent years. Due to using environmental aqueous spot-color ink, flexographic printing shows a great potential, and the problem of high-precision flexographic printing color matching also becomes a hot topic. In this paper, the problem of computer color matching of flexographic printing aqueous spot-color ink was studied. Using flexographic IGT printability tester and yellow, magenta, cyan primary colors of ink to carry out color matching experiments and obtain the color samples by changing the concentration ratio of base ink. After utilizing the spectrophotometer to measure the chromatic, we take Kubelka-Munk theory as the guide theory, which studied the color model based on the theory of the new double constant Kubelka-Munk and the model of spectral matching based on weighting factor, and carried on the evaluation. The experimental results show that the spectral color model based on the weighting factor has higher precision of color matching in terms of color model of the new double constant Kubelka-Munk theory.

Paper properties, especially paper optical properties, are important factors for ink-jet print color reproduction. The objective of this work was to explore the influences of paper optical properties on print color reproduction. Herein, papers were sized with different dyes which affect paper optical properties but had little effect on the other properties. CIE whiteness is better than ISO brightness to express the paper color, because CIE whiteness not only shows the paper lightness but also exhibits the color of paper. CIE whiteness of paper is an effective way to express the color reproduction. The color reproduction is mainly influenced by a* and b* values of paper. L* value above 94 did not have a significant impact in lightness of printed sample. The effect of paper CIE whiteness on color reproduction could be decreased by improving ink cover properties.

Because the model of flexographic spot-color matching based on Kubelka–Munk theory is proposed for the dye matching, it will produce color difference and affect color accuracy when it is applied to the ink matching. In this paper, the model of computer color matching based on double-constant Kubelka–Munk theory is improved. The model of flexographic spot-color matching in which the water-based ink is used as printing ink and corrugated paper is used as substrate is formed. In this model, first the sample data are obtained by using IGT printability tester. Then, tristimulus value matching theory is its basic, and a series of mathematical calculations are used to obtain the initial matching values. And then, a more accurate formula is obtained through multiple iterations. Finally, the improved matching model is completed. The experimental results show that the model can quickly complete the color matching, and the result is accurate and stable. Moreover, the matching model meets the requirements of environmental protection and has good prospects.