Page:Tristimulus specification of the Munsell book of color from spectrophotometric measurements (IA jresv31n1p55).pdf/25

 then with black backing. The spectral reflections of the backings used for figure 10 are shown in the figure. It will be noted that the effect of backing becomes appreciable at wavelengths greater than 550 mμ approximately, if the values of apparent reflectance are greater than 0.60 or 0.65. (The slight separation of the curves for PBP 8/2