กระดาษและผลิตภัณฑ์กระดาษ
เอกสารมาตรฐาน
สหรัฐอเมริกา
TAPPI
T 525 om-22
Diffuse Brightness of Paper, Paperboard and Pulp (D/0) – Ultraviolet Level C
2022
7
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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° viewing geometry