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 D
65
, CWF, and AError! Reference source not found‥ By the contrastive analysis of theoretical and tested spectral distribution between standard illuminant CWF and D
65
, A, it is revealed that D
65
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, D
65
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 D
65
and CWF are the best illumination source and evaluating source of jadeite jade color green respectively.