This method is for the determination of the brightness of white, near-white, and naturally colored pulp, paper, and paperboard. Brightness is a commonly used industry term for the numerical value of the reflectance factor of a sample with respect to blue light of specific spectral and geometric characteristics. This method requires an instrument employing diffuse illumination and 0 degree viewing geometry.
ANSI/TAPPI T525 om-2012 history
2012ANSI/TAPPI T525 om-2012 Diffuse brightness of paper, paperboard and pulp (d/0) - Ultraviolet level C