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DIFFUSE OPACITY OF PAPER (d/0 PAPER BACKING)


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Language: English
Product Type: Digital
Provider: TAPPI
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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.

This method is similar to ISO 2471.

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