Glass Beads

Glass beads are commonly used in filtration as a test medium to determine the absolute pore size of a filter. In the glass bead test method, a defined mixture of spherical glass particles with varying diameters is flushed through the filter medium. The largest glass bead that can still pass through the mesh defines the absolute pore size.

Glass beads are chemically inert, have a smooth surface, and precisely calibrated diameters, making them ideal as a reference medium. Beyond testing applications, glass beads are also used as blasting media, fillers, or grinding agents.

For filter mesh manufacturers like GKD, the glass bead test method is a well-established procedure to verify product quality and reproducibility. These tests help our customers assess the performance of their filters in critical applications such as food, pharmaceutical, or electronics industries, where defined retention rates are required.

By cooperating with accredited testing laboratories, we ensure that the measured pore sizes comply with relevant standards and that the filters perform reliably in their intended applications.