Rationale
A printing ink abrasion resistance tester is a specialized device used to evaluate the ability of ink coatings to resist wear under the action of mechanical friction. Its core working principle is to simulate the friction on the surface of the ink in actual use, and quantify the wear resistance of the ink layer through standardized test conditions. Typically, the instrument uses a friction head with a specific pressure and velocity, such as a rubber friction wheel or standard cotton cloth, to reciprocating or rotating friction on the surface of the ink sample. Abrasion resistance is generally evaluated by two key parameters: one is the appearance change of the ink layer after reaching the preset number of frictions (such as whether the bottom is exposed and color changes), and the other is the value of the reduction in the quality or thickness of the ink layer caused by friction. This testing is crucial for ensuring the durability of prints during subsequent processing, transportation, and use.
Test methodology
The commonly used test methods in the industry mainly follow a series of international and national standards, which specify specific equipment parameters, test procedures and evaluation systems. Common test modes include dry friction, wet rubbing, and friction testing with solvents such as alcohol added after wet rubbing to cope with different usage scenarios. The evaluation results are usually expressed in terms of the number of frictions (times) or the wear resistance level. Here are some widely referenced standards and their brief scope of application.
| Standard code | Brief description of the main application scope |
| ASTM D5264 | Standard operating procedures for evaluating the abrasion resistance of offset inks |
| TAPPI T830 | Abrasion resistance testing of paper and cardboard printing inks |
| GB/T 7706 | Chinese test method for the abrasion resistance of ink layer of paperback book prints |
| ISO 28341 | Printing Technology Post-press Comprehensive Guide to Surface Abrasion Resistance Assessment |
These standards ensure that test results are comparable between different laboratories and production enterprises, providing a unified technical basis for product quality control.
Specific applications:
The application of the Printing Ink Abrasion Resistance Tester is found in numerous industries that rely on printing, packaging, and marking. Its test results are important indicators of product durability and quality consistency.
Packaging and printing industry: In the packaging of food, daily chemicals, electronic products and other goods, inks need to withstand the friction caused by storage stacking, transportation bumps and shelf picking. The tester helps manufacturers screen inks and processes, ensuring that key information such as barcodes, shelf life, and brand identity are clearly identifiable over the life of use, avoiding circulation or identification issues due to wear and tear.
Label & Receipt Printing: Commodity labels, logistics sheets, various bills, etc. are often frequently touched and scratched during use. Through the abrasion resistance test, the resistance of the label during pasting, handling and storage can be predicted, ensuring the integrity and readability of the information, which is particularly important for logistics traceability and bill archiving.
Industrial Products & Consumer Durables: The wear resistance of printed patterns or operating instructions applied to the surface of products, such as tools, home appliances, toys, etc., is directly related to the service life and user experience of the product. Testing helps verify that the ink adheres strongly and can withstand daily cleaning and friction.
Specialty Printing Field: In textile printing (such as T-shirt patterns), metal surface printing, plastic film printing and other fields, abrasion resistance testing is a conventional item to evaluate the binding fastness of ink and substrate and the durability of finished products, which has guiding significance for material selection and process optimization.
Analysis of results
When using the wear resistance tester, it is necessary to comprehensively consider a number of technical parameters to be close to the actual working conditions. Key variables include friction pressure (P), friction velocity (v), friction strokes or total times (N), and the type of friction medium. These parameters are set according to the specific criteria and the intended use of the product. Quantitative analysis of the results sometimes involves simple mass loss calculations, the relationship of which can be approximated as:
Δm ∝ μ · P · N
where Δm represents the mass loss of the sample before and after the test, μ is the coefficient of friction, which is related to the ink-friction submaterial pairing. This relationship qualitatively illustrates the positive correlation between the amount of wear and the number of pressure and friction. In practical evaluations, it is more common to use the visual comparison method to compare the tested sample with a standard grayscale card or descriptive grade to determine its wear resistance rating. Rigorous testing requires controlled temperature and humidity in the laboratory environment, and regular calibration of instruments to ensure data accuracy and repeatability.
Epilogue
As a foundational but critical quality control tool, the value of the Printing Ink Abrasion Resistance Tester lies in translating the risk of wear and tear that a product may encounter in a real-world environment into quantifiable, comparable data in the laboratory. By following scientific testing standards and systematically applying them to a wide range of fields, from packaging and labeling to industrial products, manufacturers can effectively improve the reliability and durability of printed products, reduce potential risks caused by label wear, and ensure the smooth supply chain and end-user satisfaction. As materials and printing technology evolve, a deep understanding and appropriate application of this test method will continue to support the industry.
References
ASTM D5264-22
International Organization for Standardization technical document ISO 28341:2023
Chinese National Standard GB/T 7706-2021
Pulp & Paper Industry Technology Association Standard TAPPI T830 om-22