1.1 This test method covers the determination of the opacity of paper.1.2 Two different types of "white" backing are specified, leading to two different opacity values, in accordance with Section .1.3 This test method employs 15 diffuse g
ASTM
Standard Test Method for Opacity of Paper (15° Diffuse Illuminant A, 89 % Reflectance Backing and Paper Backing) (Withdrawn 2010)
STD-48837
1997
2007-12-01
5