| 摘要 |
Light reflected from a sample coating is measured in three directions that are angularly spaced by angles of about 15 DEG , about 45 DEG , and about 75 DEG or about 110 DEG from the direction of regular reflection of illuminating light toward the direction in which the illuminating light is applied. Color differences are then determined from the measured lights and known values of reference color tones, and one of the reference color tones whose color difference is minimum is determined. Flop values of the sample coating with respect to lightness, saturation, and hue are determined from the measured lights, and the color tone of the sample coating is determined based on color differences between the determined flop values and flop values that are characteristics of the reference color tones.
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