... and other testing department that need to test whiteness. DRK103A brightness meter also can test the paper’s transparency, opacity, ... testing department that need to test whiteness. PN-48B brightness meter also can test the paper’s transparency, opacity, ... and board Blu-ray diffuse reflectance factor method (ISO brightness); GB8904.2:Pulp whiteness assayGB1840:Industrial potato starch assayGB2913: ...