Five Practical Methods to Test Ink Adhesion Strength

Ink adhesion fastness is one of the important indicators for measuring print quality, as it directly relates to the durability and appearance of printed materials. During the printing process, timely detection of ink adhesion fastness is crucial to ensuring product quality.

Five Simple and Easy-to-Understand Methods for Testing Ink Adhesion Fastness

Scratch Resistance Test

Apply moderate pressure using a thumb nail on the dried ink layer and scratch repeatedly to observe whether there are scratch marks or ink peeling off. If these conditions occur, it indicates that the ink adhesion fastness is not ideal.

Tape Peel Test

Adhere the tape evenly on the print sample, press it firmly with your fingers, and then peel off the tape at a moderate speed to check if there is any ink adhesion on the tape. Ink marks on the tape indicate poor ink adhesion.

Dry Rub Test

Place two printed samples with their printing surfaces facing each other, apply 2~4 pounds of pressure, and rub repeatedly. If scratches or ink peeling occur after rubbing, it indicates poor ink adhesion.

Wet Rub Test

Similar to the dry rub test, but a small amount of water is added between the print samples for the friction test. This method simulates the adhesion performance of ink in a humid environment.

Detergent Resistance Test

Drop alkaline detergent on the print sample, wait for 15 seconds, then absorb it with a paper towel or soft cloth, and then wipe with moderate pressure. If there are any changes in the graphic part, such as ink peeling or color change, it indicates that the ink adhesion is not ideal.

Through these test methods, printing companies can quickly evaluate ink adhesion fastness, adjust printing processes in time to ensure the quality and durability of printed materials. These methods are simple to operate, easy to implement, and are of great significance in improving production efficiency and product quality.