ABSTRACT It was reported recently that chromaticities of neutrality across different correlated color temperatures were not located on the Planckian locus. This study is intended to establish a neutrality locus by comparing lightings presented in two adjacent viewing cabinets. For 61 light stimuli at 167 cd/m2 along seven iso-color temperature lines, each including seven to nine levels of deviation from the Planckian locus, Duv was investigated. Seventeen observers used the method of limits to determine the neutral white locus and the most neutral white. The results showed that the neutral whites were located between −0.010 and −0.015 units below the Planckian locus. It was also found that a chromaticity close to 5900 K appeared to be the unique white on the newly established neutral white locus.

中文翻译：

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中性白色位点

摘要 最近有报道称，不同相关色温的中性色度不在普朗克轨迹上。本研究旨在通过比较两个相邻观察柜中的照明来建立中性轨迹。对于 167 cd/m2 沿 7 条同色温线的 61 种光刺激，每条线都包括与普朗克轨迹的 7 到 9 个偏差水平，研究了 Duv。十七名观察者使用极限法来确定中性白色轨迹和最中性白色。结果表明，中性白色位于普朗克轨迹下方 -0.010 和 -0.015 个单位之间。还发现接近 5900 K 的色度似乎是新建立的中性白色轨迹上的独特白色。