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surface in tristimulus space that represents the locus of colour stimuli of zero luminance

Note 1 to entry: The alychne passes through the origin of the space. It intersects any chromaticity diagram in a straight line which is also called the alychne; this line lies wholly outside the domain of chromaticities bounded by the spectrum locus and the purple boundary.

Note 2 to entry: This entry was numbered 845-03-43 in IEC 60050-845:1987.

Note 3 to entry: This entry was numbered 17-36 in CIE S 017:2011.

Publication date: 2020-12
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