How Do Ink Abrasion Testers Perform Quality Checks on Labels?

Labels are critical for all items, especially while delivering safety and electrical equipment to the customers. Because of the critical information included on the labels, it is essential that they should be sturdy and long-lasting. All labels are routinely subjected to an ink rub test to verify that they will withstand the test of time. Ink rub testing has several advantages, including improving product safety, ensuring conformity with international standards, and providing long-term product value.

Here in this blog, we will discuss ink abrasion testing and how it is useful in testing the quality of packaging labels. So, let us get started!

What is Ink Abrasion Testing?

Surface coatings and printed materials can be damaged during shipping, storage, and handling, as well as by the end-user. This abrasion might cause the appearance of the products to deteriorate significantly. Therefore, most of the package label manufacturers face the problem of poor quality prints on their packaging materials. With the use of an ink abrasion testing instrument, you can easily measure the abrasion resistance ability of the materials.

Enhance the Safety and Quality of Products Delivered by Testing with Ink Abrasion Resistance Tester

Testing packaging products like labels against ink abrasion is crucial to ensure they are delivered safely to customers. Abrasion testers are used to verify that inks and printing technologies can withstand various conditions.

This equipment operates quietly and ensures even load distribution across the test area. This lab testing instrument provides valuable information about the durability of ink and other coatings. It evaluates the bond between ink and the printing surface. Rub resistance refers to a printed item’s capacity to resist marking, scuffing, or smearing during conversion, packing, distribution, and usage.

The rub resistance tester performs its tests by rubbing two printed surfaces against each other face-to-face at different speeds, including Speed 1 (21 RPM) and Speed 2 (42 RPM). It can also evaluate color transfer from printed or coated surfaces during rubbing.

What is an Ink Abrasion Resistance Tester, and How Does It Work?

An ink abrasion resistance tester is a specialized instrument that tests the abrasion resistance of ink under certain load conditions. The principle involves fixing the test sample in the device, applying specific loads (such as weights or rubbers), and simulating contact conditions to measure ink wear and durability.

Factors Affecting the Abrasion Resistance of Inks

Several factors influence ink abrasion resistance, but they can be simplified into three key categories: the ink formulation, the substrate (e.g., paper or cardboard), and the environmental conditions during printing.

1. Ink Cohesion and Adhesion

The abrasion resistance of ink largely depends on its internal cohesion and its adhesion to the substrate. Poor cohesion or adhesion results in low abrasion resistance. Using high-abrasion-resistant UV coatings can help improve durability, along with adjusting process parameters or switching materials to strengthen adhesion.

2. Environmental Conditions

Temperature and humidity also play a significant role. In humid environments, printing may result in blurring or de-inking due to moisture absorption, which softens the substrate. This necessitates increased printing pressure, which can lead to ink spread and poor image quality.

3. Substrate Absorbency

The absorbency of the printing material affects ink performance. Low-absorbency substrates may prevent ink from penetrating, causing it to sit on the surface, increasing the risk of smearing. If poor absorbency is expected, adjustments in the tile line process are necessary to mitigate these effects.

Advanced Capabilities of Ink Abrasion Testers

Modern ink abrasion testers, often controlled by microcomputers, can simulate environmental testing conditions such as high/low temperature and humidity. These testers rotate a friction plate on the ink surface and measure the abrasion resistance based on the resulting friction force, allowing for accurate and comprehensive performance evaluations under a variety of conditions.

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