An I* metric evaluation will therefore score both tone and color accuracy even for a “black and white” printing process. If the print does exhibit a certain hue, for example, a sepia toned print, or a narrow range of hues (e.g., a split tone process), then the hue and chroma values in the print define a very narrow range of color but color nonetheless. It’s just that all colors in the print have very little or no chroma, and when chroma goes to zero hue becomes undefined.
A black and white print still possesses color values.
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