Understanding Mesh Sizes
The designation 325 mesh is simply saying the powder passed through a 325 mesh screen. If you needed a powder that was closer to size you would need to specify two mesh sizes. For example: Tantalum Powder, 40+100 Mesh, 3N8 Purity This powder would have particles that were smaller than 40 mesh (420 micron) but larger than 100 Mesh (149 micron ...