object-colour stimuli corresponding to objects whose luminance factors have maximum possible values for each chromaticity when their spectral luminance factors do not exceed 1 for any wavelength
NOTE 1 – These stimuli correspond, in general, to objects whose spectral luminance factors have values of either unity or zero, with not more than two transitions between them.
NOTE 2 – The luminance factors and chromaticity coordinates of these stimuli define the boundaries of a colour solid corresponding to non-fluorescent objects.
NOTE 3 – For a given luminance factor, these colour stimuli define the maximum purity possible for non-fluorescent objects.
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