ANSI/TAPPI T 519 OM:2017(R2022)
Current
The latest, up-to-date edition.
Diffuse opacity of paper (d/0 paper backing)
Hardcopy , PDF
English
20-10-2022
Diffuse opacity, expressed as a percentage, is given by the ratio of the diffuse luminous reflectance factor of a
single sheet with black backing (Y0) to that with a backing consisting of a pad of the same paper (Y∞), multiplied by 100, i.e., (100 × Y0/ Y∞).
| DocumentType |
Official Test Method
|
| Pages |
6
|
| PublisherName |
Technical Association of the Pulp & Paper Industry
|
| Status |
Current
|
| Supersedes |
This method provides a measure of diffuse opacity (paper backing) of white and near-white papers, previously known as “printing opacity.”
| TAPPI T 1214 : 2012 | INTERRELATION OF REFLECTANCE, R[0]; REFLECTIVITY, R[INFINITY]; TAPPI OPACITY, C[0.89]; SCATTERING, S; AND ABSORPTION, K |
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