1.1 This method provides a measure of diffuse opacity (paper backing) of white and near-white papers,
previously known as "printing opacity."
1.2 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).
1.3 The method is not suitable for highly transparent papers such as glassine.
1.4 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.
1.5 This method is similar to ISO 2471.
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| Number of Pages : | 6 |
| Published : | 2011 |
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