Opacity of paper (15/d geometry, illuminant A/2°, 89% reflectance backing and paper backing), Test Method TAPPI/ANSI T 425 om-21

 

Opacity is a fundamental optical property of paper as a whole, yet the measurement of opacity is determined by a ratio of reflectance measurements. The opacity of the sheet is influenced by thickness, the amount and kind of filler, degree of bleaching of the fibers, coating, and the like. The utility of bond, writing and book papers is enhanced by a high opacity.
 
T 425 om-21
Opacity of paper (15/d geometry, illuminant A/2°, 89% reflectance backing and paper backing), Test Method TAPPI/ANSI T 425 om-21
Standard price: 57.00
Discounted price: 38.00
57.00

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