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ECT (Edge Crush Test) and BCT (Box Compression Test) of a corrugated box.

During the design and production of corrugated boxes, assessing their strength and compression resistance is crucial to ensure their performance in the transportation and storage of products. Box Compression Test (BCT) and Edge Crush Test (ECT) are important means to determine these values. The results of these tests are typically indicated on the technical specification sheets of corrugated boxes.

Box Compression Test (BCT)

BCT, also known as the Vertical Compression Test, indicates the maximum compression value that a corrugated box can withstand without deformation or rupture. It is expressed in Newtons (N) and is determined by placing the box between two flat plates and gradually increasing the vertically applied force until the box starts to deform.

BCT is a measure of a box's ability to withstand the weight of the products it contains and other stacked boxes without deforming or losing its structure. This is a critical consideration for product storage and transportation.

Edge Crush Test (ECT)

ECT is a measure of the compression strength of the corrugated box material on its edges, conducted according to the ISO 3037 standard. It is expressed in kiloNewtons per meter (kN/m). To perform this test, a sample of the corrugated material is placed vertically between two plates, and force is gradually applied to the edges until the sample starts to deform.

ECT provides an indication of the performance of the corrugated material under pressure and its ability to maintain shape and structure under a load. It is essential to ensure the performance of corrugated boxes during transportation.


Corrugated Cardboard Packaging Solutions: Focus on RCT and ECT Testing

Developing sustainable corrugated cardboard packaging solutions requires a detailed analysis of their strength and ability to withstand compression, ensuring product safety during transportation and storage. This assessment is crucial for fragile or high-value items. Vertical Box Compression Strength (BCT) tests and Edge Crush Test (ECT) are essential standard practices for measuring these fundamental properties, contributing to packaging performance and protection.

BCT Standards for Product Transport: Evaluation and Implications

BCT assesses the maximum force a corrugated cardboard box can withstand without deforming, measured in Newtons (N). This strength is tested by applying vertical pressure between two flat surfaces, following established standards like ASTM D642, TAPPI T804, and ISO 12048. These standards are significant for product safety during logistics and storage and serve as a quality benchmark in the packaging industry.

ECT and Its Impact on Packaging Quality: A Durability Metric

According to ISO 3037, ECT determines the corrugated cardboard's resistance to edge compression, expressed in kiloNewtons per meter (kN/m). This measurement, obtained by applying pressure to the edges of a cardboard sample, is a critical parameter for the packaging's ability to maintain its shape and structure. It plays a significant role in quality control for packaging suppliers.

For those seeking further knowledge, additional resources on corrugated cardboard box strength testing methods and relevant quality standards are available. These standards reflect a commitment to superior, high-performance, and sustainable packaging while promoting process optimization within the supply chain and supporting the use of eco-friendly packaging.


Vertical  Box Compression Strength (RCT) measures the ability of a corrugated cardboard box to withstand vertical force before deforming. It is crucial for ensuring product protection during transportation and storage.

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