One of the most important subjects of digital printing is evaluation of color gamut mapping. A printer can only reproduce colors that are in its color gamut. Maybe, a color tolerance between reference sample and printed sample is in agreement between manufacturer and customer. The goal of this work is to estimate the expansion of the color gamut of an inkjet textile printer by consideration of the acceptable (predetermined) color difference during color matching. For analyzing the color gamut, a standard color chart IT8.7/4-2005 CMYK target was printed by nine different mixtures of CMYK, and then the reflectance spectra and colorimetric parameters of the printed samples were measured. The inks used were disperse water-based inks that were printed on the polyester fabric. The maximum acceptable color difference in this study was equal to 2 CIELAB units for all colors. In order to estimate the color gamut with the maximum acceptable color difference, for all boundary points of gamut, expanded points were obtained by Euclidean distance less than  = 2. The results show that when the acceptable color difference is considered in color gamut measuring, the area and volume of the color gamut are increased and so, the reproducibility of printer is increased. The maximum and minimum expansions of color gamut volumes were obtained by the mixtures with minimum and maximum color gamuts, respectively. The volume expansion of the mixture with the minimum color gamut volume was 34.20%, while the volume expansion of the mixture with the maximum color gamut volume was 28.06%.

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在配色过程中扩展喷墨纺织印花的色域

数字印刷最重要的主题之一是色域映射的评估。打印机只能再现其色域内的颜色。也许，参考样品和印刷样品之间的颜色容差是制造商和客户之间同意的。这项工作的目标是通过考虑颜色匹配过程中可接受的（预定的）色差来估计喷墨纺织品打印机色域的扩展。为了分析色域，用九种不同的 CMYK 混合物打印标准比色图表 IT8.7/4-2005 CMYK 目标，然后测量打印样品的反射光谱和色度参数。使用的油墨是分散在聚酯织物上的水性油墨。本研究中所有颜色的最大可接受色差等于 2 CIELAB 单位。为了估计最大可接受色差的色域，对于色域的所有边界点，通过欧氏距离小于 = 2. 结果表明，在色域测量中考虑可接受的色差时，色域的面积和体积都增加了，从而提高了打印机的再现性。色域体积的最大和最小扩展分别由具有最小和最大色域的混合物获得。色域体积最小的混合物体积膨胀为34.20%，色域体积最大的混合物体积膨胀为28.06%。