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ANSI/TAPPI T 525 om-22

Diffuse brightness of paper, paperboard and pulp (d/0)

This method is to be used to evaluate the diffuse blue reflectance factor (diffuse brightness) of pulp by measuring handsheets prepared according to TAPPI T 218 "Forming Handsheets for Reflectance Tests of Pulp" The meThis 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 0ø viewing geometry.

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Technical Association of the Pulp and Paper Industry [tappi]

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