Beek Smoothness Meter ZY-PHD10

Product Applications:

The ZY-PHD10 Paper Smoothness Tester is a specialized instrument designed to measure the surface smoothness of high-smoothness paper and cardboard. Based on the Bekk principle, the instrument quantifies smoothness by measuring the time it takes for air to pass through the gap between the test specimen and an annular plate under a specific pressure differential. The measurement range spans 0–9,999 seconds and supports three automatic settings.

standard：

GB/T 456、ISO 5627、TAPPI T479、JJG62、ISO 5627

Principle of Operation (Bekk Air Leakage Method):

The smoothness tester employs the Bekk air leakage method to evaluate paper smoothness by measuring the time required for a specific volume of air to pass through the interface between the paper and a glass plate under specific vacuum conditions.

The specific testing procedure is as follows:

1. Place the paper sample to be tested between a precision glass plate and a pressure-applying device. Apply a standard pressure (typically 1 kgf/cm²) to ensure the sample adheres tightly to the glass plate, forming a sealed space.
2. Activate the vacuum system to reduce the air pressure within the sealed space, allowing air to slowly flow from the microscopic gaps between the paper surface and the glass into the vacuum chamber.
3. The higher the smoothness, the flatter the paper surface, the greater the resistance to air flow, and the longer the required time (in seconds). Therefore, the duration of the test directly reflects the smoothness of the paper surface.

Intended Use: Specifically designed for testing high-smoothness paper and cardboard, such as printing paper, kraft paper, and cardstock, to provide a clear indication of the material’s printability.
Usage Restrictions: Not suitable for materials thicker than 0.5 mm or highly breathable materials (such as filter paper), as excessive air permeability may lead to inaccurate measurement results.