... reflectance factor Rx, Ry, Rz IntroductionZB-A painting colorimeter &color tester is the professional instrument to test the object of the ... absorption value.It is widely applied in paper, cardboard textile, painting ,chemical building materials, plastic , cement ,food, salt, ceramics ... Thermal Printer , no need to use ink and colored tape, no noise and fast speed.6.Equipped with RS232 interface ...