... report diffuse reflectance factor Rx, Ry, Rz IntroductionZB-A Color testing machine is the professional instrument to test the object of ... , cardboard textile, painting ,chemical building materials, plastic , cement ,food, salt, ceramics cosmetic etc.The specific is the following:1. Measure ... globe of diffusion is 150mm and diameter of the testing hole is 30mm.Light absorber is provide to eliminate ...