Ink Adhesion may be evaluated using ¾-inch wide Scotch® brand 600 adhesive tape, placing the tape firmly over the area to be tested and removing it quickly at a 180 degree angle. Ink should remain on the substrate. Ink Adhesion needs to be measured and monitored on medical packages, as important information may be lost if the ink comes off and the copy becomes illegible. Additionally care must be taken that the ink does not flake off and become a contaminant. Particle size of ink flakes may be estimated using the TAPPI Dirt Chart.
|TAPPI 0109DIRTT - TAPPI Size Estimation Chart