Three standard illuminations' effect on jadeite-jade color green

The optimal illuminant of jadeite-jades' color green were confirmed by the 277 pieces jadeite-jades' analysis of L*, C* and □E* 2000 under 3 standard illuminants D65, CWF, and AError! Reference source not found‥ By the contrastive analysis of theoretical and tested spectral distribution between standard illuminant CWF and D65, A, it is revealed that D65 has continuous and smooth spectral distribution with high color temperature, combined with the testified little effects on jadeite-jades' lightness from illuminants changing by ANOVA, D65 is the illuminant which benefits for C* and L* of jadeite-jades' color green most. Color difference analysis shows that co mpared with other two illuminants, the average □E*2000 is the biggest and sample variance is the smallest under illuminant CWF. It is concluded that the standard illuminant D65 and CWF are the best illumination source and evaluating source of jadeite jade color green respectively.