You measure ink adhesion using a specific tape test method that involves scoring the ink and pulling off tape applied over the cuts.
Based on the provided reference, here is a common method for measuring ink adhesion, often used in the industry:
Tape Adhesion Test
This method is a practical way to evaluate how well ink sticks to a substrate. It's particularly useful for printed materials where durability is important.
Here are the steps involved:
- Prepare the Sample: Ensure the ink is properly cured or dried according to specifications.
- Score the Ink: Carefully cut a crosshatch pattern into the inked surface. This creates small squares of ink.
- Apply Tape: After cutting the lines, use a plastic squeegee to burnish an aggressive tape, such as 3M Brand #600 clear tape, over the scored cutlines. This step ensures good contact between the tape and the ink surface.
- Remove Tape: The tape is then pulled off 180° against itself, in one quick motion.
- Evaluate Results: Check the tape and the inked surface. If any of the ink comes off, the adhesion of the ink to the substrate is insufficient.
This qualitative test provides a clear indication of the ink's bond strength to the substrate. A good result shows no ink removed by the tape, indicating strong adhesion.
