... and Rz,Rx,Rz and yellowness index IntroductionZB-A colour tester is the professional instrument to ... chromaticity coordinate x10, y10, z10;lightness L*;chrominance a*, b*;chromaticity C*ab;hue angle h*ab;dominant ... supplementary standard colorimetric system and CIE 1976 (L*a*b) color space and color difference formula.3. ... Rz s≤0.01 ,chromaticity coordinate s≤0.0010,.R457 s≤0.105.Sampler size: Diameter of ...