Min. Order:
1
Place of origin:
China
Blue Reflectance Factor (R457) of samples. Blue Reflectance Factor is so called “Blue Whiteness” or “ISO Brightness”. 2. Analyze the sample to find out whether it contains any fluorescent brightener. If so, measure the fluorescent whiteness further, namely whitening rate. 3. Measure the opacity, transparency, light scattering coefficient and light absorbing coefficient.
[Related Keywords : brightness meter, brightness tester, whiteness meter, blue brightness test]