... diffuse reflectance factor Rx, Ry, Rz IntroductionZB-A colorimeter machine is the professional instrument to test the object ... coordinate x10, y10, z10;lightness L*;chrominance a*, b*;chromaticity C*ab;hue angle h*ab ... results of measurement and statistics. Good human-machine interface makes the instrument easy to operate. ... the imported Thermal Printer , no need to use ink and colored tape, no noise and ...