3141 Opacity (89% Backing) 82 to 95% Price: $342.00

Participants receive two similar samples for testing. Each sample consists of ten pre-conditioned 4 1/4" x 5 1/2" sheets of printing paper. Measurements are made following TAPPI Method T425, using 15 degree/diffuse geometry, illuminant A/2 degree instruments and 89% reflectance backing. Test samples are selected from a variety of printing papers within the opacity range.
Enroll at any time; your subscription will start with the next scheduled shipping date and will include six (6) shipments.
Testing conducted during January, March, May, July, September and November.