20 LB. Blue Tinted laser media is an economical sulfide acid free bluepaper roll bond for checkplots and non-permanent applications. This all purpose paper is excellent for detailed printing and imaging. Our products are designed to meet the productivity requirements of your equipment no matter which brand or manufacturer you use; from low volume to high output production systems. Tested and QT 3rd party check and balances outside source precision counting services of Dietzgen. Weight - 20LB. Opacity - 91% Caliper - 3.9MIL Smoothness - 150 Core - 3"