The performance of the black ink in ink-jet printing is of great importance to both ink-jet manufacturers and ink suppliers. Many black ink formulations contain several dyes or pigments and have a noticeable hue. The industry requires a suitable method for assessing the relative perceptual blackness of black inks. In this study, a set of black printed samples have been visually ranked in terms of perceptual blackness. Various candidate blackness indices have been evaluated and the best has been shown to be able to make pair-wise blackness comparisons with greater accuracy than the average observer.
S Westland, TLV Cheung, OR Lozman, "A metric for predicting perceptual blackness" in Proc. IS&T 14th Color and Imaging Conf., 2006, pp 14 - 17, https://doi.org/10.2352/CIC.2006.14.1.art00004