Paper Grades - NCSU
• Brightness is a measurement of the reflectivity of a material at a wavelength of 457 nm (the blue region) or R ∞at 457 nm. • Opacity determines the ability of a material to prevent light from transmitting through it. • Printing opacity is Ro/R ∞ • Gloss determines the amount of specularlyreflected light coming from the surface.
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Agriculture, Ecosystems and Environment - Faculty Sites
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