SKU: ILT-U-190
$1.00 USD
Ring Crush of Paperboard, Roughness of Paper and Paperboard  (Sheffield Method), Resistance of paper to passage of air  (high-pressure Gurley method), Brightness of pulp, paper, and paperboard (directional reflectance at 457 nm). Accordimg to TAPPI T-818, TAPPI T-538, TAPPI T-536, TAPPI T-452