How Does the Box Compression Tester Work? The operation of the Box Compression Teste is straightforward yet highly effective. The box or packaging material is placed between two compression plates. The machine then applies a steadily increasing compressive force to the box until it collapses or reaches a predefined load limit. The amount of force required to crush or deform the box is recorded as the compressive strength of the packaging material. The tester is equipped with load cells and sensors to measure the force accurately and consistently. The test results provide valuable data to packaging engineers, enabling them to make informed decisions regarding material selection and packaging design.