In photographic prints, color reproducibility is an important factor for print quality. For quantification method of color, lightness (CIEL* a* b*) and optical density (OD) based on spectral reflectance measurement method (45deg incidence/0deg light reception) is used widely.
However, there is often a case that the measured L* a* b* and the result from subjective evaluation does not match depending on observing environment. Therefore we examined new methods to evaluate “color appearance” reproduction, which highly correlated to the subjective evaluation.
And we used this new evaluation method to develop the new “imagePROGRAF PRO” series printers, and realized high optical density in black area and wide color gamut.