... object , report diffuse reflectance factor Rx, Ry, Rz IntroductionZB-A color difference meter is the professional instrument to test the object of the ... dominant wavelength λd, excited purity Pe, color difference ΔE*ab, lightness difference ΔL*, chromaticity difference ΔC*ab, hue difference ΔH*ab, Hunter system L, a ... 40mmSize and WeightDimension:360*264*400mmNet Weight:23kg ZB-A color difference meter