... factor Rx, Ry, Rz IntroductionZB-A color difference meter is the professional instrument to test the object of ... ,chromatic aberration,opacity, transparency, light scattering coefficient,optical absorption coefficient, and ink absorption value.It is widely applied in ... store 9 reference samples ( sample or data)Technical parameters1.Power :220V±10%, 50HZ2.Indication accuracy: chromaticity coordinate is ...