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TAPPI T519
- Diffuse Opacity of Paper (d/0 Degrees Paper Backing)
- standard by Technical Association of the Pulp and Paper Industry, 01/01/2006
- Publisher: TAPPI
$62.00$123.00
This method provides a measure of diffuse opacity (paper backing) of white and near-white papers, previously known as printing opacity.The method may be employed for colored papers on condition that their reflectance (paper backing) is greater than 20% and their diffuse opacity (paper backing) is greater than 45% (1).The method is not suitable for highly transparent papers such as glassine.This method employs d/0 geometry, illuminant C, and paper backing whereas TAPPI T 425 Opacity of Paper employs 15/d geometry, illuminant A, both 89% reflectance backing and paper backing.
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