ANSI/TAPPI T 534 OM:2022
Current
The latest, up-to-date edition.
Diffuse brightness of clay and other mineral pigments (d/0 diffuse) – ultraviolet level C
Hardcopy , PDF
English
20-10-2022
Diffuse reflectance is measured in the wavelength range of 400-520 nm with an effective wavelength of 457 nm by using a suitable filter set or an equivalent device for modifying the spectral response and an instrument having diffuse illumination and perpendicular observation geometry.
| DocumentType |
Official Test Method
|
| Pages |
10
|
| PublisherName |
Technical Association of the Pulp & Paper Industry
|
| Status |
Current
|
| Supersedes |
This method describes a procedure for determining the brightness of clay and other mineral pigment that has been pulverized under controlled conditions and made into uniformly compacted pigment plaques.
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